All mammals can get rabies. Dogs, cats, horses, cows, bats, raccoons, foxes, skunks, and even whales are susceptible to the virus. Birds, reptiles, fish, and amphibians cannot. Rabies is exclusively a mammalian disease, and while some species carry and spread it far more than others, no mammal is completely immune.
Wildlife Species That Spread Rabies Most
In the United States, wild animals account for more than 90% of reported rabies cases. The breakdown by species is surprisingly concentrated: bats make up 35% of cases, raccoons 29%, skunks 17%, and foxes 8%. These four groups are considered reservoir species, meaning they maintain the virus in their populations and pass it along to other animals and occasionally to people. In Puerto Rico, mongooses fill that role and frequently infect stray dogs.
Globally, the picture is very different. Dogs are the primary rabies threat in most of Asia, Africa, and Latin America. More than 99% of human rabies deaths outside the United States are linked to dog bites or scratches. Domestic dog vaccination programs in North America and Europe have largely eliminated that risk in those regions, which is why wildlife dominates the U.S. statistics.
Why Bats Are the Biggest U.S. Concern
Bats are the most commonly reported rabid animal in the United States, and most Americans who die of rabies were exposed to a rabid bat. What makes bats particularly dangerous is not aggression but subtlety. Their teeth are tiny, and a bite can be so small you may not realize it happened. This is why public health authorities treat any direct contact with a bat as a potential exposure, especially if you wake up and find a bat in your room, or if a bat is found near a child or someone who can’t reliably report a bite.
Rabies can also be transmitted if bat saliva or brain tissue contacts your eyes, nose, mouth, or an open wound, though this is far less common than transmission through a bite.
Pets and Domestic Animals
Dogs, cats, and ferrets can all contract rabies. In the U.S., routine vaccination keeps cases in pets relatively rare, but unvaccinated animals remain at risk, especially those that roam outdoors and encounter wildlife. When a vaccinated dog or cat is bitten by a potentially rabid animal, a booster shot and a short observation period are typically all that’s needed. An unvaccinated pet in the same situation faces quarantine or, in some jurisdictions, euthanasia.
Cats actually test positive for rabies more often than dogs in the United States, likely because more cats are allowed to roam freely and vaccination rates for cats tend to be lower than for dogs.
Livestock and Farm Animals
Cattle, horses, goats, and sheep are all susceptible to rabies, usually after being bitten by an infected wild animal such as a skunk, fox, or bat. Rabies in livestock can be difficult to recognize because the early signs mimic other common conditions.
In cattle, the first clue is often a sudden change in behavior. A normally calm cow becomes alert and agitated, following sounds and movement intently. Dairy cattle stop producing milk abruptly. A characteristic abnormal bellow is one of the more recognizable signs, continuing intermittently until close to death. Cattle with the “furious” form of rabies can become genuinely dangerous, attacking people and other animals.
Horses show extreme distress and agitation that can easily be mistaken for colic. They may bite or strike violently and, given their size, can become unmanageable within hours. Self-inflicted wounds are common. Regardless of species, the two most reliable warning signs are sudden behavioral changes and progressive paralysis that worsens over days.
Small Rodents and Rabbits
Squirrels, rats, mice, hamsters, guinea pigs, gerbils, chipmunks, and rabbits are rarely found to be infected with rabies and have never been known to transmit it to humans. Health authorities consider the risk from these animals so low that rabies testing after a bite is generally not recommended unless the animal was acting bizarrely or appeared overtly sick. The likely explanation is that these small animals rarely survive an attack from a larger rabid predator long enough to develop and spread the infection themselves.
Opossums and Natural Resistance
Virginia opossums occupy an interesting middle ground. As mammals, they can technically contract rabies, but they rarely do. The reason appears to be physiological: opossums are marsupials with a lower body temperature than most placental mammals, and the rabies virus doesn’t thrive in that cooler environment. So while opossums are not completely immune, finding a rabid opossum is uncommon enough that they’re considered very low risk.
Reservoir Hosts vs. Dead-End Hosts
Not every animal that catches rabies plays the same role in spreading it. Reservoir hosts like raccoons, skunks, foxes, and bats maintain distinct strains of the virus within their populations and reliably pass it to other animals. Dead-end hosts, on the other hand, can get infected and die from rabies but rarely spread it further. Most livestock fall into this category. A rabid cow, for instance, is unlikely to bite another animal in a way that transmits the virus efficiently. The same goes for most small rodents and rabbits.
This distinction matters practically. If you’re bitten by a raccoon, skunk, fox, or bat, health authorities treat it as high-risk by default. A bite from a cow or a hamster typically gets a very different risk assessment.
Animals That Cannot Get Rabies
Rabies is limited to mammals. Birds, snakes, lizards, turtles, frogs, toads, fish, and insects cannot be infected. If you’re bitten by any non-mammal, rabies is not a concern, though other infections from animal bites can still be serious. The virus specifically targets the nervous system of mammals, and it requires that mammalian biology to replicate and spread.