Consider the horse: In the wild, it spends 16–18 hours per day grazing, moving constantly. In a conventional stable, it may stand in a box stall for 23 hours, eating two large grain meals. The veterinary consequences of this behavioral deprivation are not psychological abstractions; they are physical diseases: gastric ulcers (from lack of continuous saliva-buffering forage), stereotypic behaviors (cribbing, weaving, stall-walking), and colic. A veterinarian trained in behavior does not just treat the colic; they prescribe a slow-feeder hay net and a track paddock.

Similarly, in exotic animal medicine, the failure to understand behavior is fatal. A pet bearded dragon that stops eating is not necessarily "sick"; it may lack the proper UVB spectrum (which affects its perception of food color) or the correct basking temperature (which is required for the metabolic drive to hunt). A pet rabbit with "sludge bladder" (calcium carbonate sediment) is often a victim of a sedentary indoor lifestyle and a diet lacking in fibrous hay—the behavioral need to chew and graze having been replaced by pellets.

Veterinary behavior is an specialized intersection that uses medical and behavioral data to diagnose and treat animals. This discipline is critical because:

The study of animal behavior and veterinary science are two seemingly disparate fields that have become increasingly intertwined in recent years. As our understanding of animal behavior and welfare has grown, so too has the recognition of the critical role that behavior plays in the health and well-being of animals. Today, veterinarians and animal behaviorists work together to promote optimal animal care, diagnose and treat behavioral problems, and advance our knowledge of the complex relationships between animals and their environments.