Understanding and treating canine hypothyroidism

Understanding and treating canine hypothyroidism

What is hypothyroidism?

Canine hypothyroidism is a common hormonal disease in dogs, where the thyroid gland doesn't produce enough of the hormone thyroxine. This hormone regulates metabolism, which affects all body systems. Without it, dogs can develop health problems related to weight gain, skin, coat, digestion, and behavior.

Understanding and treating canine hypothyroidism

What are the symptoms?

The signs of hypothyroidism can vary widely and develop slowly over time. Some dogs may show no signs at all, while others may have several symptoms, including weight gain, lethargy, decreased activity level, hair loss, and skin problems. Hypothyroidism can also cause behavior changes, such as anxiety, aggression, and depression. If you suspect your dog is showing any of these signs, talk to your veterinarian.

How is it diagnosed?

Your veterinarian will perform a blood test to measure thyroxine levels. However, this test alone may not be enough to diagnose hypothyroidism since other factors can affect thyroid hormone levels. A comprehensive evaluation of your dog's medical history, physical examination, and breed predisposition is also essential to make an accurate diagnosis.

How is it treated?

The treatment for hypothyroidism involves daily supplementation with synthetic thyroid hormone, levothyroxine, which is administered orally. Most dogs require lifelong treatment to maintain normal thyroid hormone levels. Regular monitoring of thyroxine levels, weight, and clinical signs is necessary to ensure the proper dosage of medication. With proper treatment, most dogs with hypothyroidism can live a normal, healthy life.


Hypothyroidism is a common condition that affects many dogs. Early diagnosis and treatment are essential to manage the symptoms and improve your dog's quality of life. If your dog is showing any of the symptoms of hypothyroidism, don't hesitate to consult with your veterinarian. By working together, you can provide the best care for your beloved pet.