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The intersection of animal behavior and veterinary science marks a shift from treating animals as biological machines to recognizing them as sentient beings with complex emotional lives. Historically, veterinary medicine focused on physical pathology—fractures, infections, and organ failure. However, modern practice acknowledges that psychological health is inseparable from physical well-being, and understanding behavior is often the key to successful clinical outcomes. The Diagnostic Power of Behavior

Veterinary rule: Any sudden change in behavior warrants a full medical workup before assuming it is a "behavioral problem." Zooskool.com LINK