***The below information was generated by AI, at the prompt of Jason Wade, of Ninja AI, in preparation for our episode that airs on 3/20/2026. The information is provided in the spirit of Good Faith and is believed to be accurate, but we have not taken the time to confirm all the information. Use this information at your own risk. Additionally, this is not an exhaustive list of every single cattle mutilation case to ever be reported.
Cattle Mutilations: The Deep Dive
Comprehensive Briefing for Podcast Preparation—March2026
What You Are Actually Dealing With
Cattle mutilation is the killing and mutilation of livestock — primarily cattle, but also horses, sheep, and other animals — under circumstances that ranchers, investigators, and sometimes forensic scientists have found difficult to explain through conventional means. The reported characteristics are remarkably consistent across decades and geography: animals found dead with specific soft-tissue organs removed (tongue, eyes, ears, genitals, rectum, sometimes lips and jaw flesh), wounds that appear clean or “surgical” rather than torn, an absence of visible blood at or near the carcass, and a notable absence of scavenger activity on the remains. In many cases, no tracks are found near the body — not even the animal’s own tracks in the final approach to where it died.
Reports began in earnest in 1967 and peaked in waves through the 1970s and into the 1980s. They have never fully stopped. Cases have been reported in every decade since, with significant clusters in the 1990s, 2000s, and 2010s, and continuing into the present. The phenomenon is not American-only: an estimated 3,500 cases have been reported in South America since 2002 alone, with clusters in Argentina, Brazil, and Uruguay.1 Cases have also been reported in Canada, Australia, and the United Kingdom.
The total number of cases is genuinely unknown. Investigators have long noted that ranchers frequently do not report mutilations to authorities — either because they expect no useful response, because they fear being ridiculed, or because they have accepted the losses as unexplained and moved on. Some investigators estimate that reported cases represent no more than one in ten actual incidents.1
The Origin Story: Snippy the Horse, 1967
The modern cattle mutilation phenomenon traces its public origin to a single case in Alamosa, Colorado, on September 9, 1967. A three-year-old Appaloosa horse named Lady — misidentified in early press coverage as “Snippy,” the name of her sire — was found dead by rancher Harry King on the family property in the San Luis Valley.
The horse’s head and neck had been completely skinned and defleshed, down to bare bone. The cuts appeared precise to the family. There was no blood at the scene, and a strong medicinal odor hung in the air. In a 100-foot radius around the carcass, there were
no tracks — not even the horse’s own — and several small holes had been “punched” into the ground. Two bushes in the area were completely flattened.2
The story was picked up by the Pueblo Chieftain and then distributed nationally. It was the first livestock death case to feature explicit speculation about extraterrestrial beings and UFOs in mainstream press coverage.2 Within days, local superior court judge Charles Bennett reported witnessing three orange rings flying in a triangular formation at incredible speed. Two sheriff’s deputies reported being followed by a floating orange globe.3
A subsequent investigation by the Condon Committee — the Air Force-funded scientific panel reviewing UFO reports at the University of Colorado — concluded there was “no evidence to support the assertion that the horse’s death was associated in any way to abnormal causes.”2 The county sheriff suggested lightning. Later reporting revealed that two students from Alamosa State College had confessed to sneaking out and shooting the horse several weeks after the case became public — though this confession came after the national mythology had already been established.2
The Snippy case established the template that would define the phenomenon for the next fifty years: an ambiguous death, a patchy investigation, a media cycle that amplified the mystery, and a community ready to fill the vacuum with extraordinary explanations.
The 1970s Wave: Scale, Geography, and the Panic
By 1973, isolated cases had become waves. The geography of the outbreak traced the cattle-ranching heartland of the American West and Midwest: Kansas, Nebraska, Colorado, New Mexico, Iowa, South Dakota, Minnesota, Montana, Oklahoma, and Wyoming. By 1975, the Colorado Associated Press had voted the mutilations the number-one story in the state.4 A 1979 FBI report cited estimates of 8,000 mutilations in Colorado alone, causing approximately $1 million in damages.5
The 1973 Kansas wave is the first well-documented cluster. Beginning in June 1973, Cloud County Sheriff Fred Modlin began receiving reports of butchered cattle — right ears removed, sex organs excised, no predator activity. By December 13, Kansas law enforcement had investigated 40 mutilations across seven counties, most occurring on land near U.S. Highway 81.6 State Senator Ross Doyen reported a mutilation on his own ranch on December 20. The Kansas Brand Commissioner’s office concluded most deaths were natural causes or predation; local law enforcement vocally disagreed.6
The 1974 Nebraska wave added a new and deeply unsettling element: unidentified helicopters. On August 20, 1974, the Lincoln Journal Star reported that residents had seen unidentified helicopters shining spotlights into fields where mutilated cows were later found the following morning.7 Knox County Sheriff Herbert Thompson reported that helicopter sightings had become a nightly occurrence, with both the FAA and the National
Guard claiming no knowledge of any helicopter activity in the area.7 Armed civilian patrols formed. The Nebraska National Guard ordered its helicopter pilots to fly at higher-than-normal altitude to avoid fire from ranchers. The Bureau of Land Management temporarily grounded all helicopters in eastern Colorado.4
The helicopter sightings were reported as quiet — witnesses described a sound “like a lawn mower” rather than the heavy chop of a conventional helicopter. New Mexico State Police, tribal police, and game wardens attempted to pursue one such aircraft near Dulce, New Mexico. When officers radioed their positions, the craft appeared to move in response.
Suspecting the operators were monitoring police frequencies, law enforcement switched to speaking only in Apache. The strategy worked: they were able to surround the craft, and one officer reported it passing directly overhead with the distinctive quiet sound.7
In 1976, two Cache County, Utah police officers reportedly confronted several men in an unmarked U.S. Army helicopter at a small community airport. According to a 2002 report, cattle mutilations in the region ceased for approximately five years after this encounter.8
By mid-decade, the panic had a contagious, self-reinforcing quality. Newsweek ran the first national coverage in September 1974. The New York Times published a story examining mutilations across 11 states in October 1975.4 Senator Floyd Haskell of Colorado wrote to the FBI pleading for federal investigation, claiming 130 mutilations in Colorado alone and reports across nine states. The FBI declined, arguing no evidence of interstate crime and thus no federal jurisdiction.9
The Characteristics: What the Reports Actually Say
Across thousands of cases spanning five decades and multiple continents, the reported characteristics are strikingly consistent. This consistency is itself one of the most puzzling features of the phenomenon — whether it reflects a real pattern in the events or a real pattern in how humans perceive and report ambiguous animal deaths is one of the central questions.
The organs removed. The most commonly reported missing parts are the tongue, eyes, ears, genitals (both male and female), rectum and anus, and sometimes the lips, jaw flesh, and lymph nodes. These are all soft-tissue organs located at or near body orifices — areas where skin is thinnest and where scavengers and insects naturally concentrate their feeding. This overlap is either the most important clue or the most important red herring, depending on which explanation you find compelling.
The “surgical” cuts. Witnesses and investigators consistently describe the wounds as clean, precise, and non-ragged. Some have used the term “laser-like.” However, the forensic record on this point is genuinely contested. FBI investigator Kenneth Rommel, examining cases up close and in person, reported seeing tooth marks and jagged edges that looked
“surgical” only in photographs or from a distance. He directly confronted one rancher who had described “surgical precision” and asked if the damage really looked that way up close; the rancher admitted it appeared “a bit rough” and acknowledged he had gotten the term from newspaper coverage.10
The absence of blood. This is perhaps the most consistently reported and most emotionally striking feature. Ranchers describe finding large animals with no blood at the wound sites and no pooling in the surrounding area. The conventional explanation is that blood pools and coagulates in the lowest points of the body after death, and that blood at wound sites is consumed by insects or reduced by solar desiccation within hours. The unconventional explanation is that the blood was actively removed — and in some cases, laboratory analysis found anti-coagulants in tissue samples from mutilated animals, suggesting the blood may have been prevented from clotting.5
The absence of scavengers. Multiple witnesses across multiple decades report that buzzards, coyotes, and other scavengers avoided the carcasses of mutilated animals for days or weeks after death. In the 2019 Oregon cases, the ranch vice president noted that the bulls’ red coats were still shiny and the animals showed no signs of scavenger activity, despite being in open country where predators were common.11 Biochemist Colm Kelleher has noted that mutilated carcasses were found to have traces of formaldehyde — a preservative that would both explain the scavenger avoidance and be consistent with a deliberate sampling protocol.12
The absence of tracks. In the Snippy case, the horse’s own tracks disappeared within 100 feet of the body. Similar reports have come from cases in New Mexico, Oregon, and elsewhere. In the 2019 Oregon cases, ranch staff drove concentric circles around the carcasses and found no tracks — in country where, as one rancher noted, “everything you do leaves tracks.”11
The age profile. Investigator Howard Burgess found that nearly 90 percent of mutilated cattle are between four and five years old — prime breeding age, when animals are at peak value and health.1 This age concentration is difficult to explain through random predation or disease, which would be expected to take a broader cross-section of the herd.
The chemical anomalies. In the 1978 Dulce, New Mexico case investigated by Officer Gabe Valdez and documented by the FBI, a bull’s liver was found to be completely devoid of copper and to contain four times the normal level of zinc, potassium, and phosphorus.
Blood samples were light pink in color and did not clot after several days. The hide was unusually brittle for a fresh death. None of the laboratories — including Los Alamos Scientific Laboratory — were able to explain these anomalies or reach firm conclusions about cause of death.5 Anti-coagulants were later confirmed in samples from other animals mutilated in the same region.5
The pre-selection evidence. In July 1976, New Mexico State Police Officer Gabe Valdez and retired Sandia National Laboratories scientist Howard Burgess screened the Gomez ranch herd with ultraviolet light, suspecting that animals might be “marked” in a way detectable from the air at night. They found five animals had been marked with a chemical that fluoresced under UV light.13 In 1981, intact radar chaff was found near a mutilated cow on the same ranch.13 Both findings suggest that some animals were deliberately identified and tracked before their deaths.
The Official Investigations
The ATF Investigation (1975)
In January 1975, the Minnesota field office of the Bureau of Alcohol, Tobacco and Firearms launched an investigation headed by Agent Donald Flickinger, tasked with investigating possible cult involvement. Flickinger recorded “unusual” incidents and circumstantial evidence but found insufficient evidence for the ATF to take further action. He arranged for two prison informants to be transferred to less-secure facilities in exchange for information; both ultimately escaped. The investigation was closed by Spring 1975.4
The Colorado Bureau of Investigation (1975‒1976)
The CBI opened an investigation in May 1975 under Carl Whiteside. Nineteen animals underwent necropsies at Colorado State University with no conclusive results. A $40,000 reward was offered. By December 1975, the CBI had investigated 203 reports. The investigation closed when Colorado reports dwindled in Summer 1976.5
The New Mexico State Police Investigation (1976‒1981)
This is the most detailed and most important official investigation. Officer Gabe Valdez began investigating in June 1976 and became the state’s primary investigator, working 32 cases over three years. Valdez solicited assistance from retired Sandia National Laboratories scientist Howard Burgess and collaborated with the FBI. His investigation produced the most significant physical evidence in the entire history of the phenomenon: the fluorescent chemical marking of pre-selected animals, the discovery of anti-coagulants and sedatives in tissue samples, the radar chaff near a mutilation site, and the consistent reports of quiet, unmarked helicopters operating at night.
Valdez’s conclusion, as reported to investigator Christopher O’Brien, was unambiguous:
“We know this stuff is made here, and it isn’t from outer space. Whoever is doing it is highly
sophisticated, and they have a lot of resources. They’re well organized.”7
His son Greg Valdez, who published a book based on his father’s case files in 2014, reported that his father never believed aliens were involved: “People want to come and find aliens, but there is no proof of aliens and my father never believed there was alien activity. He
pointed toward the government.”14
Operation Animal Mutilation: The Rommel Report (1979‒1980) Despite repeated requests from Senator Haskell, the FBI declined to investigate, citing lack of federal jurisdiction. In lieu of a federal investigation, a federally funded inquiry was
conducted under the direction of the New Mexico District Attorney’s office, headed by recently retired FBI agent Kenneth Rommel. The investigation was funded by a $44,170 grant from the Law Enforcement Assistance Administration and ran from May 1979 to June 1980.
Rommel’s 297-page final report concluded that the mutilations were predominantly the result of natural predation, but acknowledged that some cases contained anomalies that could not be fully accounted for by conventional wisdom. The FBI was unable to identify any individuals responsible.9
The report was immediately controversial. Valdez told investigator O’Brien that “during the six to eight months when Rommel was actively investigating the mutilations in New Mexico, the state became suddenly quiet with very few (if any) true mutilations being reported.” Valdez believed the mutilators had simply moved their operations elsewhere while the investigation was active.9 Canadian RCMP investigator Corporal Lyn Lauber, who was simultaneously investigating numerous cases in western Canada, stated: “I find it difficult
to understand how Rommel could make a statement such as this, without ever having
personally witnessed a real mutilation firsthand.”9
The New Yorker’s 2023 investigation noted that Rommel’s own field notes reveal his exasperation with witnesses who described “surgical precision” — a term they had absorbed from newspaper coverage rather than from direct observation. When he examined carcasses in person, he saw tooth marks and normal decomposition. The gap between what witnesses described and what he found in the field was, in his view, a media-driven narrative that had shaped perception.10
The FBI’s FOIA Files
The FBI’s cattle mutilation files are publicly available through the FBI Vault under the Freedom of Information Act. They document the Bureau’s internal deliberations about jurisdiction, correspondence with state investigators, and the Rommel investigation. The files confirm that the FBI received hundreds of reports from across the country, that it consistently declined to open a full federal investigation on jurisdictional grounds, and that its official position was that the mutilations were attributable to natural predation. The files
also document the Bureau’s awareness of the helicopter sightings and the chemical anomalies found in some carcasses.15
The Five Competing Explanations
The cattle mutilation phenomenon is genuinely unusual in that it has attracted serious competing explanations from multiple directions — not just the alien hypothesis and the skeptical dismissal, but several intermediate theories that take the physical evidence seriously while proposing human or terrestrial causes.
Explanation 1: Natural Predation and Decomposition
This is the official position of every government investigation that has been conducted. The argument is that the reported characteristics of mutilations — missing soft tissue, apparent “surgical” cuts, absence of blood at wound sites — are all consistent with known natural processes.
The case for this explanation is genuinely strong for the majority of reported cases. Blowflies and maggots concentrate on the thinnest skin and natural body orifices, producing damage that can look precise in photographs. Postmortem bloating causes the skin to stretch and split in linear tears that can resemble incisions. Blood pools in the lowest points of the body and is consumed by insects or reduced by solar desiccation within hours. The Washington County (Arkansas) Sheriff’s Office conducted a controlled experiment in which a recently deceased cow was left in a field and observed for 48 hours; postmortem bloating produced incision-like tears in the skin, and blowfly activity matched the soft-tissue damage reported in mutilation cases.1
The case against this explanation as a complete account is that it does not address the chemical anomalies (anti-coagulants, sedatives, mineral imbalances), the fluorescent chemical marking of pre-selected animals, the radar chaff, the consistent helicopter sightings, the age concentration of victims, or the scavenger avoidance. These elements are not explained by natural decomposition.
Explanation 2: Human Perpetrators — Cult Activity
The cult hypothesis was the dominant non-alien explanation in the 1970s, fueled by the broader Satanic Panic of the era and by the concurrent rise of groups like the People’s Temple. The argument was that organized groups were conducting ritual animal sacrifice, harvesting blood and organs for ceremonial purposes.
There were some circumstantial reports supporting this hypothesis: in September 1975, a forestry service employee in Blaine County, Idaho, reported seeing a group of people in black hooded robes near a mutilation site. On October 9, 1975, a motorist on U.S. Highway
95 in northern Idaho reported that approximately 15 masked individuals formed a roadblock with linked arms, forcing him to turn around; several cattle were found mutilated in the area the following day.1
However, neither the FBI nor the ATF was able to find sufficient evidence of cult involvement to substantiate the hypothesis. In most cases where cult activity was alleged, the claims were traced back to fabrication — in one case by a convict seeking favorable terms on his sentence, in another by high school students who had circulated rumors as a joke.1
Explanation 3: Covert Government Biological Monitoring
This is the most intellectually serious of the non-alien explanations, and it is the one that the most credible investigators — including Gabe Valdez himself — found most compelling.
The hypothesis was developed most systematically by biochemist Colm Kelleher, who investigated several purported mutilations firsthand. Kelleher argued that the mutilations are most likely a clandestine U.S. government effort to track the spread of bovine spongiform encephalopathy (BSE, or “mad cow disease”) and related prion diseases such as scrapie.12 His key observation was the “uncanny resemblance between the pattern of organ removals that were taking place in cattle mutilations and standard wildlife sampling techniques for monitoring the spread of infectious agents in the wild.”12
The organs most commonly removed in mutilations — tongue, lymph nodes, genitals, rectum — are precisely the organs that would be sampled in a surveillance program for prion diseases. Prions concentrate in neural and lymphatic tissue; the rectum and genitals are sites where prions can be detected in infected animals. A covert sampling program would need to operate at night, using helicopters for access to remote rangelands, sedating animals before sampling, and applying formaldehyde to carcasses to prevent consumption by scavengers (which would destroy the evidence of sampling). Mutilated carcasses were found to have traces of sedatives and formaldehyde, and their carcasses were avoided by scavengers — both consistent with this hypothesis.12
The historical precedent for this kind of covert government biological monitoring is not hypothetical. In March 1968, 6,000 sheep died near Utah’s Dugway Proving Ground, a U.S. Army facility for testing chemical and biological weapons. The Army denied responsibility until 1998, when a reporter for the Salt Lake Tribune uncovered a declassified internal report admitting that there was “incontrovertible” evidence that a nerve agent had caused the deaths.10 If the government was capable of conducting secret biological weapons tests that killed 6,000 sheep and covering it up for thirty years, covert disease surveillance on cattle is not an extraordinary hypothesis.
Greg Valdez, working from his father’s case files, reached a different but related conclusion: that the mutilations near Dulce, New Mexico were a government testing program examining
the after-effects of radiation from Project Gasbuggy — a 1967 underground nuclear detonation carried out by the Atomic Energy Commission just 21 miles southwest of Dulce. “They were testing the cattle to avoid panicking the public,” he concluded.14
Explanation 4: Secret Military Technology Testing
A related hypothesis holds that the mutilations were connected to classified military technology programs — specifically, the testing of directed-energy weapons or biological weapons intended for use in Vietnam. Journalist Dane Edwards of the Brush Banner, Colorado, developed this theory in 1975 and wrote to Senator Haskell accusing government agents of threatening him into silence. Shortly after giving an interview about his theory, Edwards was fired from the Gazette and disappeared. He reemerged in the 1990s under a new name, having founded an English-language instruction program in Mexico.1
The stealth helicopter connection is the most concrete version of this hypothesis. It was revealed decades later that stealth helicopters had been secretly developed and deployed in the early 1970s — the same period when witnesses were reporting quiet, unmarked aircraft near mutilation sites. The “quiet lawn mower” sound described by New Mexico law enforcement officers who pursued one such aircraft is consistent with early stealth rotorcraft technology.1
Explanation 5: Non-Human Intelligence
The alien hypothesis — that extraterrestrial beings are conducting biological sampling of Earth’s livestock for purposes unknown — is the explanation most associated with the phenomenon in popular culture, and the one that has been most actively promoted by investigators like Linda Moulton Howe.
Howe, a Stanford-educated journalist and Emmy Award winner, produced the 1980 documentary A Strange Harvest and the 1989 book An Alien Harvest, concluding after reviewing more than 1,000 cases that extraterrestrial involvement was the most likely explanation. Her work was based in part on information provided by a source identified as “Rick Doty” — later revealed to be Richard Doty, an Air Force Office of Special Investigations agent who was simultaneously running a documented disinformation campaign against UFO researcher Paul Bennewitz.16
The Bennewitz affair is one of the most disturbing chapters in the entire history of the UAP/cattle mutilation nexus. Paul Bennewitz was a physicist and electronics manufacturer in Albuquerque who, in the late 1970s, began monitoring what he believed were alien signals near Kirtland Air Force Base. He attended the April 1979 public meeting on cattle mutilations and became convinced the mutilations were alien in origin. Air Force agents — including Richard Doty and UFO author William Moore — subsequently fed Bennewitz a stream of fabricated documents and false information about alien bases, underground
facilities, and cattle mutilations as part of what Moore later publicly admitted was a deliberate campaign to discredit Bennewitz and prevent him from publicizing what he had actually observed near Kirtland. By August 1988, Bennewitz was accusing his wife of being controlled by extraterrestrials and had barricaded himself in his home with sandbags before being admitted to a psychiatric facility.16
Moore admitted on July 1, 1989, at a MUFON conference, that he had deliberately pushed Bennewitz toward a mental breakdown by feeding him false information. This admission was later corroborated by a declassified CIA document.16 The implication for the cattle mutilation story is significant: the most prominent early advocate of the alien hypothesis was being actively fed disinformation by government agents, and the most prominent journalist to popularize that hypothesis was working from sources who were running a documented disinformation program.
The Disinformation Layer: The Most Disturbing Part
The Bennewitz affair is not an isolated incident. The 2013 documentary Mirage Men — based on journalist Mark Pilkington’s 2010 book of the same name — argues that the U.S. military has deliberately cultivated and amplified UFO and cattle mutilation folklore as a cover for classified military programs. The argument is not that the government invented the phenomenon, but that it actively encouraged the alien interpretation to deflect attention from classified aerospace and weapons programs.17
This creates a genuinely vertiginous epistemological situation. The most compelling evidence for alien involvement in cattle mutilations came from sources who were running documented disinformation campaigns. The most credible investigators — Gabe Valdez, Colm Kelleher — pointed toward human government activity. The official investigations concluded natural causes while acknowledging unexplained anomalies. And the phenomenon has continued for nearly sixty years without resolution.
The honest intellectual position is that the disinformation layer makes it impossible to cleanly separate genuine anomalies from manufactured ones. Some of what was reported as evidence for alien activity may have been planted. Some of what was dismissed as natural predation may have been genuine anomalies. The signal-to-noise ratio has been deliberately degraded by parties with an interest in maintaining confusion.
Recent Cases: The Phenomenon Has Not Stopped
2019, Harney County, Oregon. Five purebred Hereford bulls were found dead on Silvies Valley Ranch in remote eastern Oregon. Each was bloodless, with tongue and genitals surgically removed. No tracks were found near the carcasses. No buzzards, coyotes, or
other scavengers approached the remains. The ranch offered a $25,000 reward. The Harney County Sheriff’s Office investigated with FBI assistance; the FBI would neither confirm nor deny involvement. No perpetrator was identified. The cases were later featured in a 2024 episode of Netflix’s Unsolved Mysteries.11
2023, Madison County, Texas. Six cows were found dead across three Texas counties along a highway, tongues and cheek flesh precisely excised, no blood at the scene. The Madison County Sheriff’s Office published a Facebook post that received 17,000 shares and went international within a week. One autopsy returned a finding of pneumonia as cause of death for one animal; the remaining cases were not conclusively resolved. The Animal Legal Defense Fund offered a $5,000 reward for information.18
2025, Carbon County, Montana. Investigators sought information about a cattle mutilation in August 2025, with reproductive organs removed and one piece found nearby with no tracks or blood at the scene.19 The Bozeman Daily Chronicle published a retrospective in September 2025 noting that cattle mutilation documentation filed by the FBI showed cases occurring contemporaneously in North and South Dakota, Minnesota, Nebraska, and Oklahoma during the 1970s — and that the pattern had never fully ceased.20
The Skinwalker Ranch Connection
No discussion of cattle mutilations is complete without acknowledging Skinwalker Ranch, a 512-acre property in the Uinta Basin of northeastern Utah that has become the most intensively studied site of anomalous phenomena in the United States. Rancher Terry Sherman purchased the property in 1996 and almost immediately began losing cattle to mutilation. The mutilations coincided with a range of other reported phenomena: a wolf-like creature three times the size of a normal wolf that was impervious to rifle fire, a humanoid creature with piercing yellow eyes observed in a tree, unexplained lights, and poltergeist-like activity in the ranch house.3
The property was subsequently purchased by Robert Bigelow, a Las Vegas real estate developer and aerospace entrepreneur, who funded a private scientific investigation through the National Institute for Discovery Science (NIDS). NIDS investigators, including Colm Kelleher, conducted years of on-site research and published peer-reviewed papers on the anomalies observed. The property is now owned by Brandon Fugal and is the subject of the History Channel series The Secret of Skinwalker Ranch.
What makes Skinwalker Ranch relevant to the broader cattle mutilation discussion is that it represents the only site where the phenomenon has been subjected to sustained, instrumented, multi-disciplinary scientific investigation. The NIDS team found evidence consistent with the broader mutilation pattern — including scavenger avoidance of carcasses and anomalous tissue findings — but was unable to identify a cause. The ranch
has also produced UAP sightings, electromagnetic anomalies, and other phenomena that resist conventional explanation.
The South American Dimension
The United States is not the only country with a cattle mutilation problem. Argentina, Brazil, and Uruguay have reported thousands of cases since the late 1990s, with a particularly intense wave around 2002 when approximately 400 cases were reported in a single year.1 The South American cases share the same reported characteristics as the North American ones: bloodless carcasses, precision removal of specific organs, absence of tracks and scavenger activity.
The South American cases are significant for several reasons. They occurred in a different cultural and political context, with different law enforcement and media environments, yet produced the same pattern of reports. They are harder to explain through the “media-driven narrative” hypothesis that the Rommel report implicitly relied upon — the South American ranchers were not reading the same newspapers as the Colorado ranchers of the 1970s. And they occurred in countries with no obvious connection to U.S. military programs, which complicates the covert government monitoring hypothesis.
The 1988 Brazil Human Case
In 1993, photographic evidence surfaced of a mutilated male human corpse found near the Guarapiranga reservoir in São Paulo, Brazil in 1988. The victim’s identity was kept private. The wounds were consistent with the pattern reported in cattle mutilations: removal of soft tissue from the face, eyes, and genitals, with what appeared to be clean incisions. An autopsy report concluded the wounds occurred while the victim was still alive, and the pain resulted in cardiac arrest. A subsequent independent investigation concluded the victim died from natural causes.1
This case is rarely discussed in mainstream coverage of cattle mutilations, but it is significant: if the same pattern of wounds that appears on cattle also appears on a human being, the “natural predation” explanation becomes considerably more difficult to sustain as a complete account.
What the Evidence Actually Supports
Laying out the evidence honestly, the following conclusions appear defensible:
The majority of reported cattle mutilation cases are consistent with natural death followed by predation and decomposition. The Rommel report’s core finding — that most reported
cases, examined in person by trained investigators, showed signs of natural processes — is probably correct for most cases.
A minority of cases contain physical evidence that is not easily explained by natural processes: the presence of anti-coagulants and sedatives in tissue samples, the fluorescent chemical marking of pre-selected animals, the radar chaff, the consistent helicopter sightings, the chemical anomalies in organ tissue, and the scavenger avoidance. These anomalies are documented in FBI files and in peer-reviewed scientific analysis.
The most credible investigators who worked the cases in the field — Gabe Valdez, Colm Kelleher — pointed toward human government activity as the most likely explanation for the anomalous cases, not extraterrestrial activity.
The disinformation layer — documented in the Bennewitz affair and the Mirage Men research — means that some of the evidence pointing toward alien involvement was deliberately manufactured by government agents. This does not mean the phenomenon is entirely explained by disinformation, but it does mean that the alien hypothesis has been actively promoted by parties with an interest in deflecting attention from classified programs.
The phenomenon has not stopped. Cases continue to be reported in the United States, South America, and elsewhere. They continue to produce the same pattern of characteristics. They continue to resist resolution.
How to Talk About This on the Podcast
The cattle mutilation topic is a perfect case study in the three-layer framework from your main prep document. It has a physical phenomenon layer (something is happening to cattle that produces a consistent pattern of characteristics), an information control layer (government investigations that were inconclusive, documented disinformation campaigns, classified programs that may have used cattle as unwitting test subjects), and a belief system layer (the alien narrative that has been layered on top of genuine uncertainty, partly through organic cultural processes and partly through deliberate manipulation).
The most intellectually honest and most compelling position is: “The majority of cases are natural. A minority are genuinely anomalous. The most credible investigators pointed
toward human government activity. And the alien narrative was actively promoted by people running documented disinformation programs. That combination — real anomalies, covert human activity, and deliberate myth-making — is actually more disturbing than the alien explanation.”
Key lines for the show:
- “The most credible investigator on the ground — a New Mexico state police officer named Gabe Valdez — spent three years working these cases and concluded: ‘This isn’t from outer space. Whoever is doing it is highly sophisticated, well-organized, and has a lot of resources.'”
- “The guy who most popularized the alien explanation was being fed fabricated documents by an Air Force disinformation agent. That’s not a conspiracy theory — it’s a documented, admitted fact.”
- “The organs removed in cattle mutilations are exactly the organs you would sample in a covert surveillance program for prion diseases. Tongue, lymph nodes, genitals, rectum
— that’s the standard wildlife sampling protocol for monitoring the spread of mad cow disease.”
- “The phenomenon has never stopped. There were cases in Oregon in 2019, Texas in 2023, Montana in 2025. Whatever is happening, it’s still happening.”
- “The most disturbing version of this story isn’t aliens. It’s a government that was secretly testing biological weapons, secretly monitoring disease spread in the food supply, and then actively promoting the alien explanation to prevent the public from asking the right questions.”
Timeline of Key Events
| Year 1606 | Event |
| Earliest documented livestock mutilation outbreak, London area, recorded in Court of James I | |
| 1967 | Snippy/Lady horse case, Alamosa, Colorado — first modern media coverage with UFO speculation |
| 1967 | Project Gasbuggy underground nuclear detonation, 21 miles from Dulce, New Mexico |
| 1968 | 6,000 sheep killed near Dugway Proving Ground, Utah; Army denies responsibility until 1998 |
| 1973 | First major wave: Kansas, Nebraska, Iowa; 40 mutilations in seven Kansas counties by December |
| 1974 | Nebraska wave; first major helicopter sightings; Newsweek first national coverage |
| 1975 | Colorado named mutilations its top story; ATF investigation opened; CBI investigation opened |
| 1975 | Senator Haskell writes to FBI requesting investigation; FBI declines on jurisdictional grounds |
| 1976 | New Mexico State Police investigation begins under Gabe Valdez |
| 1976 | Valdez and Burgess find five Gomez ranch cattle pre-marked with UV-fluorescent chemical |
| 1979 | Operation Animal Mutilation begins under Kenneth Rommel; $44,170 federal grant |
| 1979 | Valdez reports anti-coagulants and sedatives found in mutilated bull tissue |
| 1980 | Rommel Report released: predominantly natural causes, some unexplained anomalies |
| 1980 | Linda Moulton Howe produces A Strange Harvest documentary |
| 1981 | Radar chaff found near mutilated cow on Gomez ranch, Dulce, New Mexico |
| 1988 | Human mutilation case, Guarapiranga reservoir, São Paulo, Brazil |
| 1989 | William Moore admits at MUFON conference to feeding Bennewitz false information |
| 1996 | Terry Sherman purchases Skinwalker Ranch; cattle mutilations begin immediately |
| 2002 | Approximately 400 cattle mutilation cases reported in South America in a single year |
| 2010 | Mirage Men published, documenting government disinformation campaign |
| 2013 | Mirage Men documentary released; Greg Valdez publishes Dulce Base |
| 2019 | Five purebred bulls mutilated at Silvies Valley Ranch, Harney County, Oregon; $25,000 reward |
| 2023 | Six cows mutilated across three Texas counties; 17,000 Facebook shares; international coverage |
| 2024 | Netflix Unsolved Mysteries episode on Oregon cattle mutilations |
| 2025 | Carbon County, Montana cattle mutilation case; Bozeman Daily Chronicle retrospective |
References Footnotes
- Cattle mutilation. Wikipedia. https://en.wikipedia.org/wiki/Cattle_mutilation ↩ ↩2 ↩3
↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10
- Mutilation of “Snippy” the horse. Wikipedia. https://en.wikipedia.org/wiki/Mutilation_of_%22Snippy%22_the_horse ↩ ↩2 ↩3 ↩4
- The Mysterious History of Cattle Mutilation. HISTORY, April 27, 2021. https://www.history.com/articles/cattle-mutilation-1970s-skinwalker-ranch-ufos ↩ ↩2
- Wave of Mutilation: The Cattle Mutilation Phenomenon of the 1970s. Goleman, Michael
J. Agricultural History, 2011. https://read.dukeupress.edu/agricultural-history/article/85/3/398/296756/Wave-of-Mutilation-The-Cattle-Mutilation ↩ ↩2 ↩3 ↩4
- Animal Mutilation Project. FBI Records: The Vault. https://vault.fbi.gov/Animal%20Mutilation ↩ ↩2 ↩3 ↩4 ↩5
- Cattle mutilations by county in Kansas and Nebraska, 1973. The Belleville Telescope, December 13, 1973. ↩ ↩2
- Gabe Valdez. Wikipedia. https://en.wikipedia.org/wiki/Gabe_Valdez ↩ ↩2 ↩3 ↩4
- Cattle mutilation — Helicopter sightings section. Wikipedia. https://en.wikipedia.org/wiki/Cattle_mutilation#Helicopter_sightings ↩
- Operation Animal Mutilation / Rommel Report. New Mexico District Attorney’s Office, 1980. Referenced in: Inquiry Discounts Wide Reports Of Cattle Mutilation in the West. New York Times, April 16, 1980. https://www.nytimes.com/1980/04/16/archives/inquiry-discounts-wide-reports-of-cattle-mutilation-in-the-west.html ↩ ↩2 ↩3 ↩4
- The Enduring Panic About Cow Mutilations. Monroe, Rachel. The New Yorker, May 8, 2023. https://www.newyorker.com/news/letter-from-the-southwest/the-enduring-panic-about-cow-mutilations ↩ ↩2 ↩3
- ‘Not One Drop Of Blood’: Cattle Mysteriously Mutilated In Oregon. NPR, October 8, 2019. https://www.npr.org/2019/10/08/767283820/not-one-drop-of-blood-cattle-mysteriously-mutilated-in-oregon ↩ ↩2 ↩3
- Kelleher, Colm. Brain Trust: The Hidden Connection Between Mad Cow and Misdiagnosed Alzheimer’s Disease. Paraview, 2004. ↩ ↩2 ↩3 ↩4
- Valdez, Greg. Dulce Base: The Truth and Evidence from the Case Files of Gabe Valdez. Levi-Cash Publishing, 2013. ↩ ↩2
- Book claims government behind cattle mutilations. Santa Fe New Mexican, September 23, 2013. https://www.santafenewmexican.com/news/local_news/book-claims-government-behind-cattle-mutilations/article_5c78559b-39a3-5610-b49b-df0a8a327af8.html ↩ ↩2
- FBI Records: The Vault — Animal Mutilation. https://vault.fbi.gov/Animal%20Mutilation
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- Paul Bennewitz. Wikipedia. https://en.wikipedia.org/wiki/Paul_Bennewitz ↩ ↩2 ↩3
- Pilkington, Mark. Mirage Men: A Journey in Disinformation, Paranoia and UFOs. Constable & Robinson, 2010. ↩
- $5,000 Reward for Information Regarding Six Killed and Mutilated Cows in Three Texas Counties. Animal Legal Defense Fund, May 3, 2023. https://aldf.org/article/5000-reward-for-information-regarding-six-killed-and-mutilated-cows-in-three-texas-counties/ ↩
- Investigators seek information about cattle mutilation in Carbon County. Yahoo News, August 25, 2025. https://www.yahoo.com/news/articles/investigators-seek-information-cattle-mutilation-223617375.html ↩
- Grim smiles: The enduring mystery of cattle mutilations in Montana. Bozeman Daily Chronicle, September 22, 2025. https://www.bozemandailychronicle.com/news/grim-smiles-the-enduring-mystery-of-cattle-mutilations-in-montana/article_73682839-ef2d-55af-bd50-b3169b5fce90.html ↩