hypothyroidism in dogs

Hypothyroidism in Dogs

Hypothyroidism is a common condition in dogs that results from a deficiency in thyroid hormones. It is most commonly associated with a low production of the thyroid hormone, thyroxine (T4). If your canine companion is suffering from hypothyroidism, he or she may exhibit a variety of symptoms and require treatment.

See also  How to Test for Hyperthyroidism: Blood Tests, Imaging, and Other Diagnostic Tools

Symptoms of Canine Hypothyroidism

The most common symptoms of hypothyroidism in dogs are:

  • Weight gain
  • Excessive shedding and coat thinning
  • Depression and lethargy
  • Decreased appetite
  • Dry or oily skin
  • Hair loss
  • Inflamed gums
  • Irregular heat cycles
  • Intolerance to cold

Causes of Hypothyroidism in Dogs

Hypothyroidism in dogs can be caused by a variety of factors, such as:

  • Autoimmune disorder (Hashimoto’s disease or lymphocytic thyroiditis)
  • Viral or bacterial infections
  • Genetic predisposition
  • Iodine deficiency
  • Surgical removal of the thyroid gland

Diagnosing Hypothyroidism in Dogs

If your veterinarian suspects that your canine companion is suffering from hypothyroidism, he or she will likely order a thyroid profile. This test looks at levels of thyroid-stimulating hormone, thyroxine (T4), triiodothyronine (T3), and free thyroxine (FT4).

Treating Hypothyroidism in Dogs

If your dog is diagnosed with hypothyroidism, your veterinarian will likely prescribe a thyroid supplement. This medication, called levothyroxine, is a synthetic form of the T4 hormone and will help to restore normal thyroid levels. Your veterinarian will monitor your canine companion’s progress and may need to adjust the dosage over time.


Hypothyroidism in dogs, symptoms, causes, diagnosis, treatment, levothyroxine, thyroxine T4, triiodothyronine T3, free thyroxine FT4, thyroid profile, thyroid supplement.

See also  thyroid storm symptoms