Hypothyroidism in Dogs

Hypothyroidism is a disease caused by insufficient thyroid hormone production.  The thyroid gland is located in the neck, on either side of the trachea.  It produces two hormones: thyroxine (T4) and triiodothyronine (T3).  Thyroid hormones affect the rate of metabolism in most of the tissues in the body.  Thyroid hormone deficiency leads to illness. Clinical …

Hyperthyroidism in Cats

Hyperthyroidism The thyroid is a two-lobed gland located in the lower part of the neck.  It produces a substance called thyroid hormone, which is transported via the blood to the cells in the body.  Thyroid hormone regulates how fast cells function.  Too much thyroid hormone speeds up the metabolism and causes illness.  No matter how much the cat …