Hypothyroidism is a disease caused by insufficient levels or the body’s abnormal use of thyroid hormone. In some pets, the pituitary gland is involved, but most cases are due to inadequate production of hormones by the thyroid gland.

The condition rarely appears in pets under 2 years of age; instead, middle-aged or older pets are usually affected. Signs include some or all of the following: reduced stamina, increased sleeping, reduced tolerance to cold, dry coat and skin, premature graying of the muzzle, hair loss, slow hair growth, increased weight gain, recurrent skin infections, and the appearance of dark pigment in the skin. The face may appear puffy, and females may have irregular cycles and /or reduced fertility. Males have a shrinkage of the testes and show less interest in females.

Important Points in Treatment

• Blood tests are necessary to diagnose the condition and monitor treatment.

• Hypothyroidism is controlled rather than cured, and lifetime therapy is necessary.

• Diet: Follow the instructions checked.

• Activity: You may notice an increase in your pet’s activity after therapy has begun.

• Medication must be given as directed. Call the doctor if you cannot give the medication.

Notify the Doctor if Any of the Following Occur:

• Your pet becomes extremely active or excitable.

• Your pet has vomiting or diarrhea.

• Your pet’s condition does not improve.

• Your pet’s general health worsens.

Note: This article is provided by Claws & Paws Veterinary Hospital® for informational purposes only.