Symptoms of Feline Hyperthyroidism

Feline hyperthyroidism is one of the most common diseases of the feline endocrine system.    It takes place when the thyroid glands produce an excess amount of thyroid hormones.  Symptoms of feline hyperthyroidism can vary from cat to cat.  In some cases, observation may not reveal any outward signs of the disease.  Diagnosis of the condition will only be made when the veterinarian is conducting an annual examination.  Feline hyperthyroidism usually affects middle-aged to older cats. 

Cats that exhibit clinical symptoms of feline hyperthyroidism can be seen vomiting, licking or pulling at their fur excessively, consuming large quantities of water, and as a result urinating excessively.  In some cases the afflicted cat will develop a ravenous appetite, increased heartbeat, and begin yowling for no apparent reason.  The majority of cats diagnosed with this disorder have an enlarged thyroid gland.  When the levels of thyroid hormones increase and circulate, they can affect almost all of the cat’s organs.

When a cat develops hyperthyroidism, it causes their body to burn calories at a high rate.  If hyperthyroidism is left untreated, it can cause heart failure.