Hypothyroidism is a disease caused by insufficient levels or abnormal functioning of thyroid hormone.  In some pets, the pituitary gland is involved, but most cases are the result of inadequate production of hormones by the thyroid.

The condition rarely appears in pets under 2 years of age. Middle-aged or older pets are more commonly affected.  Signs include some of the following:

Ear infections

Decreased Activity

Weight gain while eating little

Weakness in legs

Reduced tolerance to cold

Dry hair coat and skin

Premature graying of the muzzle

Hair loss (generally not itchy)

Slow or lack of hair regrowth

Recurrent skin infection

Dark pigmentation of the skin

Seizures or nerve deficits

Important Points in Treatment

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

When your dog is first diagnosed with hypothyroidism, a supply of pills will be dispensed for your pet. A second T4 (thyroid) blood test will be necessary in 3 to 6 weeks to ensure the correct dosage for your pet is being given. 

Do not let the thyroid supplement pills run out before rechecking T4 blood level, or a false low reading will occur. 

Please give the thyroid pill as usual on the day of recheck appointment, but do not feed the morning of the blood test.

After a normal T4 level is found with supplementation, a blood test will be requested periodically to ensure the dosage requirements do not change.

2.     Thyroid supplementation is a lifetime therapy.

3.     You may notice an increase in your pet’s activity after treatment is started. 

      This is normal.

Notify the Doctor if Any of the Following Occur

¨      Your dog becomes extremely active, panting or excitable.

¨      Your dog’s condition does not improve by the next recheck appointment.

¨      Your dog’s general health seems to gets worse.