What are wild and exotic animals?
There is not a firm definition of what a wild or exotic animal is, but it can be understood to mean any animal that is not one of seven domesticated species: dogs, cats, horses, pigs, cows, sheep, and goats. In the United States, a “wild” animal is typically understood to mean a non-domesticated native animal (e.g., raccoons and skunks) while an “exotic” animal is typically considered a non-domesticated, non-native animal (e.g., tigers).*
In contrast, over thousands of years and many generations, domesticated species like cats, dogs, and sheep have adapted to live alongside humans—and humans have adapted to live alongside them. The relationship is symbiotic: domesticated animals benefit from the safety and protection that we provide, and humans benefit from things like a sheep’s woolly coat, which we can make into warm clothing.
There are also specific changes in domesticated animals that we do not see in their wild counterparts. Cats, even as adults, purr, meow, and knead; these behaviors are not observed in wild cats. Dogs can interpret human facial expressions to a degree not even seen in great apes. Domesticated animals have undergone significant and physical and behavioral changes as well, such as a reduction in fear and aggression, and displays of submission not seen in similar wild animals. Wild and exotic animals have not undergone these evolutionary changes.
A 2020 survey conducted by World Animal Protection estimates that there 17.6 million exotic pets in 9 million households in America. For tigers specifically, wild populations number fewer than 4,000, compared to at least 5,000 held in captivity in the United States.
Is having wild and exotic animals as pets a problem?
Yes, usually. Keeping wild and exotic animals as pets is problematic not only for the animals themselves, but also for people, public health, other wild animals, and the ecosystem. Many wild and exotic animals are in fact illegal to own in Massachusetts. For those that are legal, it is important for people to make informed decisions and commit to providing the proper and complex care that the animal will need. (Learn about our avian and exotics veterinary department.)
Keeping a wild or exotic animal as a pet is often detrimental to the animal.
Wild and exotic animals are acquired in various ways. Some are captured and taken from their native habitats. Others are bred in captivity (e.g., in animal mills or by backyard breeders) and some are “surplus” animals from roadside attractions, zoos, and game ranches. They are sold legally and illegally by dealers at auctions, pet stores, and online.
Regardless of the source, wild and exotic animals destined for captivity almost certainly will endure a brutal transport and distribution process. A 2014 seminal peer-reviewed study in the Journal of Applied Animal Welfare Science reported the findings from an investigation of a large international wildlife wholesaler; 26,400 animals of 171 different species were discovered, 80% of which (21,120 animals) were gravely ill, injured, or dead, and almost 3,500 deceased or moribund animals were also being discarded on a weekly basis. Causes of mortality included cannibalism, crushing, parasite infestation, and starvation. Death rates during transport alone can also be quite high. African parrots, for instance, die at a rate of 45-90%. In 2025, a comprehensive review published in Animals (Basel) presented ten case studies of different species traded globally, finding that all experienced poor welfare conditions, including long-term stress, depressive-like states, frustration, and severe hunger.
Wild and exotic animals have complex physical, psychological, social, and behavioral needs that are vastly different from those of domesticated companion animals. They may require specific housing, diets, enrichment, and specialized and expensive care that most individuals are not knowledgeable about and/or cannot provide. Many are highly social and need to be with members of their own species but are denied that contact. Consequently, wild and exotic animals may live their entire lives in captivity without even their most basic needs being met, all the while suffering from stress, frustration, and boredom—many develop physical, psychological, and behavioral problems as a result.
Further, when baby wild and exotic animals mature, they often become too large or aggressive to keep as pets. Their owners may attempt to “rehome” the animal to a zoo or sanctuary. However, as the USDA has explained in its position statement opposing private big cat ownership, “[p]lacement of these unwanted animals is difficult because most zoos are unwilling to take them and few sanctuary facilities exist,” and in the case of big cats, many “end up being killed for their pelts and meat.” Other overwhelmed owners sometimes choose to release these animals into the wild, mistakenly believing that they will be able to fend for themselves. However, these animals are often released outside their native habitats, where their chances of survival are slim. Further, even if a wild animal pet is released into its natural habitat, these animals are often stripped of their natural survival and defense systems. For example, skunks may have their scent glands removed, and wild cats may be declawed. And because they have been habituated to people, they are attracted to human-associated food (e.g., trash, birdseed, barbecue drippings), which can lead to wildlife conflicts.
Keeping wild or exotic animals as pets can threaten the survival of that animal’s species.
Demand for wild and exotic pets fuels the illegal capture and trade of millions of mammals, birds, reptiles, and fish each year. Not only do many of these animals suffer and die during capture and transport, but their removal from their native habitats can contribute to a decrease in wild populations of these species. For example, the exotic animal pet trade has decimated natural populations of radiated tortoises in Madagascar and has led to the endangered status of African gray parrots.
Keeping wild or exotic animals as pets jeopardizes human safety and health.
Because they have not lost their wild qualities, wild and exotic pets can present serious dangers to the safety and health of people. Numerous attacks resulting in injuries and deaths to people have been recorded. The animals involved included not only species commonly considered by the public to be dangerous—such as tigers, bears, and mountain lions—but also primates, deer, and even a raccoon, skunk, and squirrel. Animals involved in fatal attacks included venomous snakes (8 deaths), constricting snakes (5), wolf hybrids (6), deer (5), tigers (4), bears (3), and—with one death each—an elk, wildebeest, camel, liger, and lion. In all likelihood, this report underestimates the number of injuries that can be attributed to wild and exotic animals, as many are likely not reported to health officials (especially if the animal is unlawfully kept) or reported in the media.
Wild and exotic pets may also present a danger to the public when they escape from their handlers or enclosures (or are intentionally set free). In 2021, a pigtailed macaque escaped its home in Reno, Nevada. The monkey, who had also escaped at least one time before, injured four people, including at least two children, before being captured. In 2011, a man who kept a large collection of exotic animals on his property in Zanesville, Ohio, released more than 50 of the animals from their enclosures and subsequently died by suicide. Citing concern for public safety, responding law enforcement officers shot and killed 49 of the animals, including 18 tigers, 17 lions, eight bears, three mountain lions, two wolves, and a baboon.
Zoonotic diseases are those that can be transmitted from animals to people. Many pathogens found in wild and exotic animals can be transmitted to and cause illness or death in humans, including but not limited to rabies, distemper, herpes viruses, salmonella, polio, tuberculosis, Rocky Mountain spotted fever, and bubonic plague. According to an article published in the Journal of Pediatric Health Care, “[e]xotic pets may pose the greatest health risk to infants and very young children (i.e., those younger than 5 years) because they are more susceptible to infection as a result of suboptimal hygiene practices and naïve immune systems and because their small size and natural curiosity predispose them to injury from attacks, bites, and scratches …” Salmonella infections typically result in diarrhea, vomiting, fever, and abdominal cramping, and in some cases, can prove fatal. Young children, elderly adults, and persons with compromised immune systems may be especially vulnerable. After a wave of salmonella infections, in 1975, in an effort to prevent salmonella infection in small children, the U.S. banned the sale of turtles with shells less than 4 inches long. Nevertheless, cases of salmonella and other zoonotic diseases passed from wild and exotic pets to humans continue.
Keeping wild or exotic animals as pets can endanger other animals and the environment.
Keeping wild and exotic animals not only threatens human welfare but can also endanger the health and survival of other animal species. Wild and exotic pets can spread disease to other species of animals, including not only native wildlife but also domesticated animals, including domesticated pets. In the 1970s, parrots smuggled from South America were connected to an outbreak of exotic Newcastle disease, which resulted in the deaths of 12 million birds in the U.S. There is concern that because of a lack of systematic screening for disease in most exotic animals imported into the U.S., we may see future epidemics among native species of wildlife, with potentially devastating consequences for these endemic populations.
Wild and exotic animals who escape or are released into non-native environments can become invasive species that threaten the survival of native species by altering natural habitats, disrupting food chains, and decimating the populations of both native prey and predator species. The exotic pet trade is considered to be one of the primary contributors to the spread of invasive species. In Massachusetts, people are no longer permitted to have red-eared sliders as pets because so many were released into the wild that the red-eared slider has become an established invasive species in several areas of the state. The red-eared slider now competes with native turtles—including those that are listed as endangered, threatened, or species of special concern—for food, habitat, and other resources.
For all of these reasons, the American Veterinary Medical Association (AVMA), U.S. Department of Agriculture (USDA), Centers for Disease Control and Prevention (CDC), and Food and Drug Administration (FDA) all express concern or oppose the private ownership of some or all wild and exotic animals and hybrids. According to an AVMA policy statement, the organization “is concerned with animal welfare, husbandry, infectious diseases, public health and safety, and environmental impacts associated with ownership of wild and exotic pets and their hybrids. The AVMA is also concerned that circumstances may arise in which caregivers of such animals may no longer keep them…” The USDA outright opposes the private ownership of large wild and exotic cats such as lions, tigers, cougars, and leopards. And both the CDC and FDA have expressed grave concern about the risks that ownership of wild and exotic animals presents to public health and safety.
Wild Animals as Pets – Recent Cases in Massachusetts
The Lincoln African serval case:
African servals are wild animals that are not legally allowed to be kept as pets in Massachusetts (though they can be kept by zoos and for educational purposes with a permit). In January 2022, an injured African serval was found roaming loose and in distress in a Lincoln resident’s backyard. The MSPCA was able to capture the serval and found the animal to be very thin and suffering from a serious leg injury, which was broken in two places. Because of the injury—thought to have been suffered several months earlier—and the pain he was suffering, veterinarians had to amputate the limb.
When the serval was found, he had no ID tags and was not microchipped, making it nearly impossible to identify who had been keeping him. His rescuers named him “Bruno,” and he was estimated to be about one year old. The MSPCA relocated Bruno to The Wildcat Sanctuary, an accredited nonprofit sanctuary in Minnesota with experience in caring for servals. He will live there for the remainder of his life, which may exceed 20 years.
The Westfield River alligator case:
In December 2021, a young alligator in danger of starvation and perishing in the cold New England winter was rescued from the Westfield River near West Springfield. The animal had been periodically seen in the river since about August but had eluded capture. Officials suspect that the reptile had been kept illegally as a pet and then dumped and left to fend for himself after he grew larger and more aggressive. The alligator was thin from not having eaten, and it was thought he had tried to keep warm by crawling up a drainage pipe. The Massachusetts Environmental Police took possession of the alligator and it was later given to a properly licensed nonprofit organization.
Massachusetts laws regulating the keeping of wild and exotic pets
In Massachusetts, the sale and ownership of wild and exotic animals is tightly controlled via state statutes and administrative regulations. These laws regulate which animals are prohibited from private possession, which may be sold or possessed only with a permit, which may be sold or possessed without a permit, and which may be taken from the wild.
In Massachusetts, the private possession of certain wild and exotic animals is prohibited unless a person obtains a license from the Massachusetts Division of Fisheries and Wildlife (MassWildlife), which is only granted for certain scientific, educational, commercial, or other specific reasons, and is not issued for keeping a wild animal as a pet. Limited exceptions are granted for population recovery breeding programs for endangered and threatened species and for those who lawfully possessed their animals before the regulation was approved (321 CMR 2.12(10)(h) and (10)(i)).
Massachusetts also requires a permit to possess any species that is listed in any rarity category of the International Union for the Conservation of Nature Red List of Threatened Species, any category of federal endangered species law, or the Massachusetts List of Endangered, Threatened, and Special Concern species. The Massachusetts Endangered Species Act (M.G.L. c. 131A) specifically protects 180 native species of animals, which are classified as at risk, or potentially becoming at risk, of extinction. Some of these animals are also protected by the U.S. Endangered Species Act.
An animal unlawfully sold or possessed in violation of M.G.L. c. 131, § 23 or the relevant Code of Massachusetts Regulations “may be seized and shall be disposed of by the director of law enforcement for the best interests of the commonwealth.” This may include euthanasia of the animal.
However, MassWildlife has established lists of species exempted from the licensing requirements of M.G.L. c. 131, § 23 and 321 CMR 9.01, which meet four criteria: (1) accidental release would not harm the state’s ecology; (2) the animal—whether in captivity or escaped—poses no substantial danger to humans through injury or disease; (3) its care is no more demanding than that of common domestic animals; and (4) trade in the species does not significantly affect wild populations. Such animals may be imported, possessed, maintained, propagated, bought, sold, exchanged, or offered for sale without a license or permit from MassWildlife. These exempted animals include many species of aquarium trade fish, many species of amphibians and reptiles, and certain birds and mammals. For example, exempt species that may be kept as pets include certain boas and pythons, snapping turtles, toucans, hedgehogs, and chinchillas.
However, other local, state, and federal licensing laws may still apply, and exempt animals must still be kept in a manner appropriate for their health and safety. Also, the lists of species for which a permit is or is not required are very specific and consideration of all relevant laws is always necessary. The law also stipulates which animals may be taken from the wild. While these animals may be kept as personal pets, they may not be sold, bartered, or exchanged.
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