Hypothyroidism is the most common endocrine disorder in dogs and causes significant quality of life changes including lethargy, weight gain, and skin problems, but responds excellently to treatment.
Hypothyroid dogs suffer from lethargy, weight gain, and poor coat condition that significantly reduces quality and enjoyment of life. Many are misidentified as simply lazy or overweight. Treatment with thyroxine produces rapid and dramatic improvement in welfare, usually within weeks. Long-term compliance with twice-daily medication sustains excellent quality of life.