Hypothyroidism in dogs is common and welfare-significant — recognition, diagnosis, and management for affected animals.
Canine hypothyroidism is a welfare-significant condition where the gap between onset and diagnosis is often measured in years rather than months, because the signs develop insidiously and are easily attributed to aging. A dog with hypothyroidism experiencing weight gain despite unchanged eating, progressive lethargy, and cold intolerance is experiencing a form of chronic physiological compromise that diminishes quality of life measurably. The welfare stakes make early diagnosis and treatment important — treatment is simple, effective, and dramatically improves quality of life for affected dogs. Veterinarians who routinely offer thyroid screening for middle-aged and older dogs in predisposed breeds provide a meaningful welfare service.