Companion Animal Welfare

Dog Hypothyroidism Recognition and Management

Hypothyroidism is one of the most common endocrine disorders in dogs, causing weight gain, lethargy, skin problems and poor coat quality, with excellent response to treatment.

Key Facts

Hypothyroidism is most common in Golden Retrievers, Dobermanns and Irish Setters
Affected dogs gain weight despite normal food intake and become lethargic
Skin changes including hair loss and thickened skin are classic signs
Diagnosis requires thyroid hormone testing as signs are non-specific
Daily oral levothyroxine is highly effective and inexpensive

Welfare Considerations

Hypothyroid dogs often live in a state of chronic fatigue and discomfort for months or years before diagnosis, as signs develop gradually and are attributed to ageing. Treatment with levothyroxine typically produces dramatic improvement within weeks - owners often describe their dog as a 'new animal'. Early diagnosis and consistent treatment give hypothyroid dogs excellent quality of life.

What You Can Do

Have dogs with unexplained weight gain, lethargy or skin changes tested for hypothyroidism
Ensure consistent daily medication for diagnosed dogs
Monitor thyroid levels every 6-12 months to maintain optimal dosing