Hypothyroidism is the most common hormonal disorder in dogs, causing significant quality-of-life impacts that are often mistaken for normal aging.
Undiagnosed hypothyroidism causes sustained welfare impacts. Dogs experience fatigue that prevents normal activity, weight gain straining joints, and skin changes causing discomfort. Behavioral changes including increased anxiety can strain the human-dog bond. The condition is often missed because symptoms mimic normal aging. Once diagnosed and treated, the welfare improvement is dramatic, emphasizing the importance of regular veterinary wellness exams including hormone screening in at-risk breeds.