Pet Wellbeing - Thyroid Support Silver for Dogs - Natural Support for Thyroid Health  - 2oz(59ml) Low energy Weight gain Dry skin and hair; skin may turn darker in patches and be susceptible to infections Symmetrical hair loss on tail, trunk and possibly head Furrowed skin on the face Cold intolerance (may seek warm places) Depression; doesn&#039;t show enthusiasm Bowel changes such as diarrhea or constipation Joint problems Heart abnormalities such as enlarged heart, slow heartbeat (bradycardia) or irregular heartbeat (arrhythmia). High cholesterol levels Eye problems such as dry eyes, uveitis or corneal ulceration