Clinical ethology—the study of animal behavior in a veterinary context—has shifted from a niche interest to a core component of general practice. This change is driven by the understanding that a "healthy" animal is not merely one free of disease, but one that is mentally stimulated and emotionally stable.

A behavior medication never replaces a medical workup. Prescribing fluoxetine for a "depressed dog" without ruling out hypothyroidism or chronic pain is malpractice.

: Changes in routine, such as inappropriate elimination or sudden lethargy, can reveal underlying medical issues like urinary tract infections or neurological disorders.

This specialized branch focuses on treating behavioral disorders through a medical lens.