Hypothyroidism is a disorder in which the thyroid glands are underactive and don’t secrete enough thyroid hormone.
Since your dog’s thyroid glands regulate her metabolism, an underactive thyroid generally means her metabolism is slower than it should be.
With proper care, your hypothyroid dog can have a normal life span and good health.
According to Mary Shomon, About.com’s thyroid expert:
“While there is a genetic predisposition for thyroid disorders, environmental factors such as pollutants and allergies probably play a role as well.”