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A dog with a thyroid imbalance may seem hyperactive and untrainable. A cat with dental disease may suddenly start eliminating outside the litter box, not out of spite, but because the pain of clenching to urinate is unbearable.

Conversely, behavioral problems cause physical disease. Chronic anxiety in a dog leads to elevated cortisol, which suppresses the immune system. A stressed horse that crib-bites wears down its teeth and risks colic. A parrot that plucks its feathers opens the door to bacterial infections. A dog with a thyroid imbalance may seem

This is the heart of behavioral veterinary science: distinguishing between a pet who wants to bite and a pet who hurts . One of the greatest challenges in the field is overcoming the old-school myth that all bad behavior is a training failure. While training is vital, it is not a cure for medical issues. Chronic anxiety in a dog leads to elevated

Consider the dog who suddenly starts drinking from puddles. An owner might see a bad habit. A savvy veterinarian sees a potential case of Cushing’s disease or diabetes. Consider the elderly cat who begins yowling at 3 AM. This is rarely "being mean"—it is often the first sign of hypertension or cognitive dysfunction syndrome. This is the heart of behavioral veterinary science:

When a cat hides under the exam table or a dog growls from the corner of the consultation room, many owners see stubbornness or spite. But a growing number of veterinarians see something else: a clinical clue.