This divide was problematic for two reasons. First, animals cannot speak. A human patient can say, "My stomach hurts." An animal must show you. Second, many physical diseases present first as behavioral changes. By the time a veterinarian sees obvious clinical signs—fever, swelling, lameness—the disease is often well advanced.

A sudden change in an animal's behavior should always be treated as a potential medical issue until proven otherwise. Common examples include:

While companion animals drive most research, the intersection of animal behavior and veterinary science is vital for production and exotic animals.

These technologies do not replace veterinary clinical judgment. They augment it—turning anecdotal observations into data-driven insights.

Historically, a trip to the veterinary clinic was expected to be a stressful, white-knuckle experience for pets and owners alike. Animals were routinely restrained using brute force to accomplish procedures quickly.

Repetitive behaviors like tail-chasing, flank-sucking, or excessive licking can stem from dermatological allergies or neurological disorders. Over time, these can transform into compulsive psychological habits.

Veterinarians now use validated based on behavior (e.g., the Glasgow Composite Measure Pain Scale for dogs and cats) to objectify what the eye sees.