Because these signs are behavioral, owners often assume it is "just old age." Veterinary science has proven that CDS correlates with beta-amyloid plaques in the brain. Early detection via behavioral checklists allows for intervention (dietary changes, environmental enrichment, and selegiline) that slows progression.
In veterinary science, behavior is often the first "vital sign." Because animals cannot verbally communicate pain or discomfort, they express internal distress through external actions. A cat that stops grooming or a dog that suddenly becomes aggressive is rarely "misbehaving"; rather, these are clinical symptoms. For example, repetitive licking in dogs (acral lick dermatitis) can be a manifestation of chronic anxiety or a response to localized physical pain. By studying ethology—the science of animal behavior—veterinarians can differentiate between psychological boredom and neurological dysfunction. Stress and Physiological Health Because these signs are behavioral, owners often assume