Hypothyroidism in Cats

Hypothyroidism is a condition that occurs when the thyroid gland does not produce enough thyroid hormone. Our vet specialists in Springfield discuss hypothyroidism in cats, including its signs and symptoms, causes, and treatment options for this condition.

Hypothyroidism vs Hyperthyroidism in Cats

While they sound similar, hyperthyroidism and hypothyroidism are two different internal conditions that cats can experience. However, hypothyroidism is considerably rare compared to hyperthyroidism.

Several essential processes in your cat's body, including metabolic rate, are regulated by the hormones your cat's thyroid produces. Hypothyroidism in cats essentially means that your cat's thyroid is underactive, causing an underproduction of the hormones needed to help your cat's body function as it should. Conversely, if your cat's thyroid is overactive, they suffer from hyperthyroidism. This is most commonly seen in older cats.

What causes hypothyroidism in cats?

So, what causes hypothyroidism in cats? In most cases, feline hypothyroidism occurs in cats who have undergone surgery or iodine therapy to treat hyperthyroidism, which has resulted in the thyroid underproducing the related hormones. That said, there are several other possible causes of this condition, such as cancer, iodine deficiency or thyroid gland abnormalities. In any case, you should bring your feline friend to your vet for a full examination and diagnosis if they begin to display any concerning symptoms such as those listed below.

What are the symptoms of hypothyroidism in cats?

As mentioned above, if your cat has hypothyroidism, their metabolism will slow due to a lack of essential thyroid hormones. Hypothyroidism in cats can result in the following symptoms:

How is hypothyroidism treated in cats?

Treatment of hypothyroidism in cats is usually not needed. Even so, if your pet's symptoms are severe, your vet may prescribe synthetic hormone supplements, and follow-up blood tests will be scheduled to monitor your cat's hormone levels.

A modified diet with reduced fat may also be recommended for your cat while they recover from hypothyroidism. Most cats have no issues with recovering from this condition and can be back to themselves in only a few months.

Is hypothyroidism in cats painful?

While hypothyroidism itself is not generally painful, if left untreated, it can result in side effects and complications that are known to be painful. In kittens with congenital hypothyroidism, the resulting lameness can cause moderate to severe discomfort.

Adult cats living with untreated hypothyroidism can experience a range of uncomfortable symptoms and side effects, such as:

• Pain and inflammation from excessive and sudden weight gain.
• Dehydration caused by decreased kidney function or chronic renal (kidney) disease.
• Conditions resulting from a buildup of toxins in the bloodstream.
• Nausea or vomiting.
• General weakness or illness.

How long can a cat live with thyroid problems?

Cats typically recover well and quickly from this rare condition. Provided your cat has no underlying health concerns, in most cases, your cat's life expectancy will remain unchanged by this condition.

What about cats experiencing hyperthyroidism?

Thankfully, the prognosis for cats with hyperthyroidism is quite good, especially if their condition has been diagnosed early. Regardless of the type of treatment your vet recommends, you can expect your cat to bounce back and live a happy and healthy life if you continue to bring them in for regular checkups and stay on top of managing their condition.

The Potential Complications of Untreated Hyperthyroidism

As with most conditions, leaving hyperthyroidism untreated can lead to serious complications. Your cat will become more ill over time. You may notice symptoms such as blood in their stool, and they may not eat very much, which can lead to other issues.

Many cats that are suffering from untreated hyperthyroidism experience potentially fatal heart issues due to their heart working extra hard to keep your cat's body running.

Radioactive Iodine Treatment for Cats in Springfield

Radiocat, available through The Regional Veterinary Referral Center, is designed to cure feline hyperthyroidism using Radioiodine (I-131) injections to destroy the complete thyroid tumor safely. It is a cost-effective method of eliminating thyroid tumors with no tissue damage, no harmful side effects and no need for anesthesia.

Ask your primary care veterinarian for a referral to our specialty hospital today.

Note: The advice provided in this post is intended for informational purposes and does not constitute medical advice regarding pets. For an accurate diagnosis of your pet's condition, please make an appointment with your vet.