For decades, veterinary training focused heavily on physiology, pathology, and treatment protocols. But a quiet revolution is underway. Today’s veterinarians are learning that a growl isn’t just a sound—it’s a clinical sign . A parrot plucking its feathers isn’t always sick with a virus; sometimes it’s sick with loneliness. A horse weaving its head side to side in a stall isn’t being “annoying”—it’s showing a stereotypic behavior, a window into psychological distress.