In dogs: panting when resting, reluctance to jump, changes in sleep-wake cycles, whining, licking a specific joint. In cats: reduced grooming, sitting with a hunched posture, avoiding stairs, decreased appetite, crying when using the litter box.
The intersection of and veterinary science represents the most significant leap forward in companion animal welfare since the invention of the rabies vaccine. This interdisciplinary approach, sometimes called "behavioral medicine," recognizes that emotional health is not separate from physical health, but rather the foundation upon which it is built. The Physiology of Fear: Why Behavior is Medical To understand why veterinary science must embrace behavior, one must first look at the endocrine system. When an animal is stressed or frightened—whether by a thunderstorm, a stranger, or a needle—the body releases cortisol and adrenaline. In short bursts, this "fight or flight" response is adaptive. But for a pet that experiences chronic anxiety (separation distress, noise phobia, or fear of the veterinary clinic itself), prolonged cortisol elevation has devastating physical consequences. In dogs: panting when resting, reluctance to jump,
A previously friendly dog who snaps when touched near the hip may have osteoarthritis. A cat who hisses when lifted may have dental pain or abdominal discomfort. Sudden personality changes are rarely "training failures"; they are almost always pain until proven otherwise. In short bursts, this "fight or flight" response is adaptive