Companion Animals

Companion Dog Hypothyroidism Welfare and Management

Hypothyroidism is common in middle-aged dogs and is highly treatable - early diagnosis prevents significant welfare compromise.

Key Facts

Hypothyroidism is one of the most common endocrine disorders in dogs
It is most common in middle-aged dogs of medium to large breeds
Signs include weight gain, lethargy, cold intolerance, hair loss, and skin changes
Diagnosis requires measuring T4 and thyroid stimulating hormone levels
Treatment with twice-daily levothyroxine is highly effective and usually lifelong
Welfare improves dramatically within weeks of starting appropriate treatment

Welfare Considerations

Hypothyroidism causes gradual welfare decline that owners often attribute to aging. By the time diagnosis is made, many dogs have suffered months of lethargy and discomfort. Awareness of signs and routine health screening in at-risk breeds enables earlier diagnosis and faster welfare improvement.

What You Can Do

Consult your vet if your middle-aged dog is gaining weight despite stable food intake
Ask about thyroid screening for breeds predisposed to hypothyroidism
Ensure consistent twice-daily dosing if your dog is on levothyroxine treatment
Monitor energy levels and coat condition as indicators of treatment adequacy