Cat Myths That Veterinarians Wish Would Disappear

The feline righting reflex is real: cats can rotate their body in mid-air to attempt a feet-first landing. However, this reflex takes time and distance to complete, meaning very short falls (under a few feet) may not allow enough time for correction. Even longer falls that result in an upright landing can cause significant injuries — fractured legs, jaw trauma, and ruptured diaphragms are all documented consequences of high-rise falls in cats. Veterinarians see these injuries regularly. Any cat that has fallen from a height greater than a few feet should be examined by a vet promptly, even if the animal appears to be walking normally.

Purring is often associated with contentment, and it can certainly signal that. But research and clinical observation show that cats also purr when stressed, frightened, or in pain — it appears to serve a self-soothing function. Some cats purr during veterinary examinations precisely because they are nervous. There is also evidence suggesting the low-frequency vibrations of a purr may support bone healing, which might explain why cats purr when recovering from injury. The takeaway: purring alone is not a reliable indicator that your cat is pain-free. Watch the full picture — body posture, appetite, litter box habits, and activity level — to gauge how your cat is actually feeling. For more on reading feline signals accurately, our article on decoding common feline behaviors is a helpful reference.

The reputation for independence is partly earned — cats are more autonomous than dogs in many respects — but independence is not the same as self-sufficiency. Cats need proper nutrition, clean water, mental stimulation, and social interaction. They also need regular grooming support, particularly long-haired breeds. Home grooming techniques can keep coats and nails manageable between vet visits. Left without adequate enrichment and attention, cats can develop behavioral problems, stress-related illnesses, and chronic anxiety. The idea that a cat will simply thrive with minimal input often leads to preventable health and behavior issues going unnoticed until they become serious.

Some pathogens can enter a home on clothing, shoes, or through windows with screens. Fleas can hitch a ride indoors on people or other pets. Certain viruses, such as those covered by core feline vaccines, are robust enough to survive in the environment. Rabies vaccination is legally required for cats in many U.S. states, regardless of indoor status. Veterinary guidelines from organizations like the American Animal Hospital Association still recommend core vaccines and individualized parasite prevention for indoor cats. Skipping these measures based on the assumption that indoor living provides complete protection leaves cats vulnerable to preventable diseases.

Kittens produce the enzyme lactase to digest their mother's milk, but many cats produce significantly less lactase as they reach adulthood. Cow's milk contains more lactose than cat's milk to begin with, making it even harder to digest. While some cats tolerate small amounts without obvious symptoms, others experience prompt and uncomfortable gastrointestinal distress. The image of a cat happily lapping up a saucer of milk is cultural nostalgia, not nutritional guidance. Fresh water is always the right default; if you want to offer a liquid treat occasionally, ask your veterinarian about lactose-free options formulated for cats.

Intact female cats face elevated risk of pyometra (a life-threatening uterine infection) and mammary tumors, especially if they cycle through heat without becoming pregnant. Intact male cats are more prone to testicular cancer and certain prostate issues, and are significantly more likely to roam, fight, and sustain injuries. The framing of surgery as inherently harmful misunderstands how these procedures reduce disease burden over a cat's lifetime. Our full explainer on spaying and neutering cats details what owners can expect and why most veterinarians strongly recommend it.