It affects older cats 8-10 years plus most often with up to 10% of senior cats will develop hyperthyroidism. There is no sex predilection. Canned cat food. There has been research which points towards a link between the consumption of canned food and hyperthyroidism in cats, especially fish or liver flavoured varieties. (Martin, K.M et al., 2000) Best Cat Food for Hyperthyroidism and Sensitive Stomach: Cats recovering from hyperthyroidism require a diet rich in protein, fat, and calories but that can be challenging if the cat also has a sensitive stomach or food allergies Hyperthyroidism in cats is a common disease that affects middle-aged and senior cats. Hyperthyroidism refers to excessive levels of thyroid hormone being produced by the thyroid glands located in the neck. This can have significant health implications, because thyroid hormone is involved in the normal regulation of metabolic processes in the body
Cats with chronic kidney disease and diabetes mellitus exhibit some signs similar to hyperthyroidism. Your veterinarian may also need to perform tests for these diseases to ensure an accurate diagnosis. If your cat has hyperthyroidism, her thyroid gland will be enlarged and produce excessive amounts of thyroid hormone. Managing hyperthyroidism Feline Hyperthyroidism, a Treatable Condition Recent prevalence studies show that around one out of 10 cats aged 9 or older have a common disease called feline hyperthyroidism. While this condition is treatable, it is frequently mistaken for aging, and if left untreated, feline hyperthyroidism will be fatal. Hyperthyroidism is a progressive disease with a slow, [
Shop The Cat Collection At ASOS, With Free Delivery & Returns! Express Your Individuality With ASOS Designers & Let Your Wardrobe Speak For You Hyperthyroidism in cats is also referred to as thyrotoxicosis. It comes as a result of an increased production in the thyroid hormones, which are known as T3 and T4. When this occurs, the thyroid gland(s) in your cat's neck will become enlarged as a result. It appears that the root cause of hyperthyroidism in cats is unknown
Occasionally, cats with early, mild hyperthyroidism may have normal blood levels of T3 and T4. If the veterinarian still suspects the disease, a second blood test should be taken a few weeks later, due to the fluctuation of the hormones in and out of the normal range in the early stage of the disease Cats with hyperthyroidism have happier, healthier lives when their caregivers are knowledgeable about the disease and its dietary management.. Here are some hyperthyroidism management tips about what should be included in a diet for cats with hyperthyroidism and why it's such an important part of managing the disease David Bruyette, DVM, Diplomate ACVIM Hyperthyroidism is recognized as the most common endocrinopathy of older cats. Traditional therapeutic measures include thyroidectomy, radioactive iodine therapy, and antithyroid medications. A new therapeutic option—a limited-iodine diet that helps normalize thyroid hormone concentrations and alleviate clinical signs—is now available. Hyperthyroidism. Below are pet medicationsthat may be prescribed for Hyperthyroidism for cats. These Hyperthyroidism medications can come in different dosage forms. Indicates featured items. Amitriptyline / Methimazole Twist-a-Dose Transdermal Gel. Amitrityline / Methimazole Twist-a-Dose Transdermal Gel . Client Handout - Advantages and Disadvantages with Different Ways to Treat Hyperthyroid Cats. Audio Podcast - Listen to SAGE Journal's podcast interview with Hazel Carney, DVM, MS, DABVP, AAFP Advisory Panel co-chair, and co-author of the guidelines
Hyperthyroidism is a disease seen primarily in older cats, in which kidney disease is also common. The clinical challenge is that hyperthyroidism can mask the presence of kidney disease, 1 and until now, there has not been a reliable routine diagnostic test that can assess kidney function in cats affected by hyperthyroidism. The diagnosis and treatment of hyperthyroidism in cats. These cookies are necessary for the website to function and cannot be switched off in our systems
Hyperthyroidism is almost exclusively seen in middle- to old-aged cats, and is rarely seen in cats less than seven years of age. Male and female cats are affected with an equal frequency and although no studies have shown any breeds that are particularly prone to developing hyperthyroidism, there is some evidence that it is less common in Siamese cats Hyperthyroidism is the most common hormone imbalance in cats. See our article completely and know more about the hyperthyroidism in cats, its symptoms and treatments to cure the hyperthyroidism on cats. Completely look our article and know more about them Mention hyperthyroidism to most people with cats, and they've either had a cat with hyperthyroidism or know of someone who has. Indeed, take a straw poll of the cats in my own house, and a third of them are hyperthyroid, while the stats tell us 1 in 10 cats aged 10 years or older are hyperthyroid Hyperthyroidism in Cats Prognosis. Several of the symptoms of hyperthyroidism can also be attributed to other diseases such as kidney failure, kidney disease, diabetes, heart disease, mellitus, or liver disease. Because of this, further tests are performed to determine if other disorders are present
Hyperthyroidism is common in cats, especially middle-aged and senior cats. On its own, hyperthyroidism is simple to treat, though it requires surgery or medical treatment. However, hyperthyroidism in cats is linked to the development of other conditions as well, such as heart disease, hypertension, and kidney or brain damage Hyperthyroidism. Hyperthyroidism is a high amount of thyroid hormone in the blood. This generally occurs in middle-aged and older cats and typically appears at around 10-13 years of age. Signs of hyperthyroidism include: Weight loss despite increase in appetite; Increased activity level; Increased urination; Diarrhea; Aggression; Nervousness.
Hyperthyroidism is unfortunately common in older cats - and many believe that it is linked to the foods they eat. In fact, some studies have linked certain feline commercial diets directly to this disease. A common diet traditional veterinarians recommend for a hyperthyroid cat is a prescription canned diet by Hill's (y/d) Hyperthyroidism is a common condition in older cats because of an excess of circulating thyroid hormone, called thyroxine. The thyroid gland, located in the neck, is responsible for the body's metabolism
Older cats sometimes begin producing too much thyroid hormone. It's a condition called feline hyperthyroidism. Veterinarians don't know what causes it, but it speeds up the cat's metabolism, causing a gradual weight loss and hyperactivity . The cat's heart progressively cannot perform as efficiently, and eventually congestive heart failure will occur. All of which can be avoided by treating the hyperthyroidism Feline hyperthyroidism is characterized by overproduction of T4 (thyroxine) and T3 (triiodothyronine) hormones via the thyroid glands in cats. As a result of excessive T4 and T3 hormone secretion, concentrations of T4 and T3 reach supraphysiological concentrations within the body of the cat. At supraphysiological concentrations, these hormones elicit deleterious effects upon normative. Hyperthyroidism in Cats. Cat owners know that nothing is quite as devastating as watching your poor kitty-cat suffer due to any kind of illness or health concern. A very common problem, especially in older cats, is hyperthyroidism. This disorder can affect your cat's hormonal balance, causing her to lose weight and feel all out of sorts
Feline Hyperthyroidism Felinehyperthyroidismisthemostcommonendocrinedisorderinmiddle-aged andoldercats.Itoccursinabout10percentoffelinepatientsover10yearsofage Indeed hyperthyroidism has been reported to be the most common endocrine disease of the cat since shortly following its initial description in 1979. 22 More recent reports suggest the disease currently affects upwards of 10% of the geriatric cat population. 23 While no clear causative relationships have been identified, numerous reports have suggested weak correlations between various elements. Bubba was diagnosed with hyperthyroidism following a rapid onset of clinical signs. He is a well-nourished 15 year old cat with an excellent health history with minor exceptions: a crisis with urinary crystals several years ago, and an undetermined illness that struck when he was 12. He is also the alpha cat of our 3-cat household, which also includes Jaspurr and Joey
Leaving your cat's hyperthyroidism untreated, however, can result in many difficulties. It can even be fatal. Untreated Cat Hyperthyroidism Long-Term. Veterinarians who have seen a cat with untreated feline hyperthyroidism often see cats that have grown very sick over the years. A cat with untreated hyperthyroidism may stop eating altogether Hyperthyroidism is a surprisingly common condition in cats, and you're sure to have some questions about how to manage it. Here we look at the different options and speak to clinical animal nutritionist Marge Chandler for her advice on dietary changes Most cats with hyperthyroidism have elevated levels of the thyroid hormone T4 in their bloodstream, but a small percentage of cats with hyperthyroidism have T4 levels within the normal range. If your cat does not have elevated T4 levels but your veterinarian still suspects your cat has hyperthyroidism, additional tests may be recommended Hyperthyroidism in cats may be treated with medications that help stop the thyroid from overproducing hormones. These medications don't cure the disorder, thought they do inhibit the thyroid gland, and will likely need to be need given for the rest of the cat's life Hyperthyroidism is the most common hormonal disorder diagnosed in cats. It occurs when the thyroid glands, located in your cat's neck, produce an excess of thyroid hormone. Thyroid hormone helps regulate and control normal bodily processes. Think of it as an engine gauge: in simple terms, it controls how fast or slow the body functions
Hyperthyroidism in cats is best treated using conventional medicine. Unfortunately, there are no natural treatments. The best option in my opinion is probably the iodine injection. Even though you won't see your cat for several weeks it's usually very effective Diagnosing Hyperthyroidism in Cats. At this point you may be thinking, that sounds similar to signs of kidney disease or diabetes and you would be correct. It is virtually impossible to differentiate hyperthyroidism from chronic kidney disease (which also commonly occurs in older cats) based on clinical signs alone
Hyperthyroidism in Cats What Is Feline Hyperthyroidism? Feline hyperthyroidism is a common endocrine disorder in older cats, caused by the overproduction of thyroid hormone. Left untreated, hyperthyroidism can result in heart failure and other complications, and can even lead to death Hyperthyroidism results when the thyroid gland over-produces thyroid hormones. Felimazole (methimazole) is the only drug approved to treat the disease in cats Hyperthyroidism is one of the most common endocrine conditions affecting cats, especially older cats over the age of 10 years. Some veterinarians estimate that about 5 to 10% of middle- to old-aged cats will develop hyperthyroidism, and, due to factors that may include environmental exposures, that number is on the rise
. This mass may interfere with the swallowing function. Dysphonia is hoarseness of voice, which can be associated with a damaged trachea, often in the case of hyperthyroidism, due to a mass or tumor on the thyroid Hyperthyroidism can have effects on multiple organ systems, since the increased thyroid hormone levels increase the cat's metabolic rate. Hyperthyroidism is diagnosed in cats from age 4 to 20 + years, although this disease is usually diagnosed in older cats (95% are at least 8 years of age) Hyperthyroidism, or thyrotoxicosis, is the most common endocrine disease in cats. When an animal or a person has hyperthyroidism it means that there is a high concentration of thyroid hormones in the blood. The opposite, low thyroid hormone levels, is called hypothyroidism Apathetic hyperthyroidism represents an unusual form of hyperthyroidism that occurs in approximately 10% of cats with hyperthyroidism. In these cats, the typical signs of hyperactivity and increased appetite are replaced by depression and inappetance. Weight loss may progress at an enhanced rate in these cats. In addition to these nonspecific.
Unfortunately, with hyperthyroidism comes a host of concurrent diseases such as thyrotoxic heart disease, high blood pressure, chronic kidney disease, medically-induced hypothyroidism, and urinary tract infections. Cat owners need to be aware of these side effects, but Dr. Putter points out that overall, the long-term prognosis is usually very good depending on the treatment chosen, the type. Hyperthyroidism Medication for Cats (Methimazole) Hyperthyroidism Treatment Options in Cats and Dogs. Hypertrophic Cardiomyopathy in Cats. Hypocalcemia (Low Blood Calcium) in Cats and Dogs. Idiopathic Cystitis in Cats. IMHA: Four Letters You Never Want your Dog or Cat to Meet
Hyperthyroidism may be asymptomatic or present with significant symptoms. Some of the symptoms of hyperthyroidism include nervousness, irritability, increased perspiration, heart racing, hand tremors, anxiety, trouble sleeping, thinning of the skin, fine brittle hair, and muscular weakness—especially in the upper arms and thighs.More frequent bowel movements may occur, and diarrhea is common Feline hyperthyroidism is the most common endocrine disorder in middle-aged and older cats. It occurs in about 10% of cats over 10 years of age. Hyperthyroidism is a disease caused by an overactive thyroid gland that secretes excess thyroid hormone. Cats typically have two thyroid glands, one gland on each side of the neck The hyperthyroidism in cats is a commonly diagnosed condition, specifically in the senior cats. The condition results in the superfluous levels of the thyroid gland, as well as circulate through the affected bloodstream of the cat. Give this article a read and get to learn more about hyperthyroidism in cats and more Hyperthyroidism (also referred to as hyperthyroid disease) is the most common feline endocrine disorder, usually found in cats over 8 years old. The disease is due to the overproduction of thyroid hormones, which results in an increase of overall body metabolism Hyperthyroidism in cats is a common condition in middle-aged to older cats. The clinical signs of feline hyperthyroidism include increased appetite with weight loss. Left untreated, cats develop high blood pressure, kidney disease, and heart problems. Read on t learn more about this condition
When looking to choose the best cat food for your cat with Hyperthyroidism, you should choose a food that's low in carbohydrates, loaded with easily digestible protein, and low in iodine. Please keep in mind that food is not a cure for Hyperthyroidism, but the right type of diet can help to ease the symptoms and side-effects that come with the disease while being treated Hyperthyroidism in Cats. Hyperthyroidism is a progressive disease with a slow, subtle onset, becoming more obvious with time. Early signs may be hard to recognise because the increased appetite and high levels of activity often seen are not always recognised as abnormal What Cats Are At Risk More than 10% of all cats will develop hyperthyroidism in their lifetime. Hyperthyroidism is a disease of older cats and develops in cats nine years old and older. The average age of a cat to be diagnosed with this disease is thirteen years old Hyperthyroidism in cats can be controlled with the proper diet. Our list includes both non-prescription products. non-prescription products won't directly treat hyperthyroidism, but they might help your cat feel better before and after medical treatment
There is no known genetic predisposition for hyperthyroidism, but it is quite common in cats. In fact, hyperthyroidism is the most common hormonal (endocrine) disease in the cat population, often seen in late middle-aged and older cats. (The mean age of discovery is approximately 13 years, with a range of 4-22 years.) Symptoms and Type Hyperthyroidism in Cats. The thyroid gland, located inside the lower neck, plays an important role in regulating the body's rate of metabolism. Hyperthyroidism is a disorder characterized by enlargement of the thyroid gland, followed by subsequent overproduction of thyroid hormone and an increase in a cat's metabolic rate A cat with both kidney disease and hyperthyroidism is a challenge to manage; you'll need to work closely with your veterinarian if this is the case. 1 Wakeling J, Elliott J, Syme H. Evaluation of predictors for the diagnosis of hyperthyroidism in cats. J Vet Intern Med 2011;25(5):1057-1065 Your cat is very likely to develop secondary conditions as a result of the hyperthyroidism. These can include serious heart problems which can result in heart failure. High blood pressure can also be encountered in hyperthyroid cats and this can lead to damage of your cat's eyes, kidneys, heart and brain Not all cats are created equal and your kitty may be one who likes to buck the trend. A small percentage of cats who develop hyperthyroidism go the exact opposite route with symptoms, and show a decreased appetite, lethargy and depression instead of behaving like a hyperactive hummingbird
Hyperthyroidism was first described in cats in the 1970s. Since then, cases of the disease have continued to climb. While some of that may be due to veterinarians becoming more aware of it and diagnosing it more commonly and an increase in people seeking veterinary care for their cats, most scientists believe that the incidence of feline hyperthyroidism is increasing Although commercial cat food contains large amounts of iodine, studies have failed to demonstrate a correlation between dietary iodine and feline hyperthyroidism. By and large, several goitrogenic substances are commonly found in the environment and in cat food, most notably substances such as phthalates, resorcinol, polyphenols and polychlorinated biphenyls If your cat has been diagnosed with hyperthyroidism, it is likely that one of the options your vet has discussed with you is giving Kitty medication to manage her illness. Methimazole is often prescribed to control thyroid levels, but you should be aware of its pros and cons
Diagnosis of hyperthyroidism includes screening the hormone output of the thyroid as well as screening for other systemic disease. This is achieved by running a complete blood count, biochemistry panel, urinalysis and total T4 (tT4). In cats with signs of hyperthyroidism but with tT4 levels in the upper half of the reference range will often have their free thyroid hormone tested using a. I am sorry about your cat. I just joined this site because my cat was just diagnosed with hyperthyroidism. I was going to get her the I-131 therapy despite the expense, but she failed a test! She has some cystic growths on her liver, and I was given very little guidance. She seems well aside from being thin. I've had cats with this before
Hyperthyroidism is the most common hormonal imbalance in senior cats. This occurs when the thyroid gland becomes enlarged and produces more thyroid hormone. The excessive amount of thyroid hormone causes weight loss, increased liver enzymes, vomiting, heart disease, and excitability/anxiety Hyperthyroidism is the most common endocrine disorder affecting the thyroid gland of older cats, characterized classically by elevated total thyroxine (T4) above the reference range of 20-40 nmol/L. . Iodine content of the diet has been suggested as a likely etiologic factor in feline hyperthyroidism.. It is uncommon to see hyperthyroidism in cats under 10 years of age, and is commonly caused. Hyperthyroidism, also called thyrotoxicosis, is the most common glandular disease affecting older cats with less than six percent of all cases occurring under 10 years of age. Hyperthyroidism is the term for the condition that occurs when the thyroid glands (two glands located in the neck) become enlarged and over-produce thyroid hormones (T3 and T4) Hyperthyroidism Signs Typical signs of hyperthyroidism in cats include rapid weight loss, rapid heart rate, and increased hunger, Dr. Brummet says. It is typical for older cats to lose weight as they age, making it hard to distinguish hyperthyroidism from normal aging. If left undiagnosed, hyperthyroidism may cause eye problems. Dr Hyperthyroidism is not a risk factor for subclinical bacteriuria in cats: a prospective cohort study (2020) Peterson ME, Li A, Soboroff P, Bilbrough GE & Rishniw M Journal of Veterinary Internal Medicine Epub ahead of print found that hyperthyroid cats do not appear to be at higher risk of subclinical (i.e. the cat does not show any signs) UTIs and states that it is not necessary to check.
Hyperthyroidism, or the overproduction of thyroid hormone in the body, is a serious condition in both humans and their pets. According to the Textbook of Veterinary Internal Medicine, hyperthyroidism is a common problem in cats over eight years old and occurs much more frequently than hypothyroidism, where the body produces too little thyroid hormone Hyperthyroidism in cats is one of the most commonly diagnosed diseases in older cats. Research suggests 10 percent of older cats will develop the disease during their lives (1).. This disease relates to a cat's thyroid gland, a butterfly-shaped gland that sits in the neck of cats and produces essential hormones that regulate metabolic rates and other cardiac function A: Cats should be off anti-thyroid drugs for a week before receiving I-131. This helps with the incorporation of radioiodine into thyroid hormone. If you or your veterinarian are concerned about withdrawing anti-thyroid drugs for a week because of the severity of your cat's hyperthyroidism, please contact us by calling 607-253-3060
Hyperthyroidism in cats is caused by an increase in production of thyroid hormones from enlarged thyroid glands, located on both sides in the cat's neck. In most cases, enlargement of the thyroid glands is caused by a tumor called an adenoma, which is almost always non-cancerous Top 5 Signs of Feline Hyperthyroidism. 1.Weight loss. Weight loss is the most common sign in hyperthyroid cats and is seen in up to 98 percent of affected cats, even though they usually are eating adequate amounts of food. It is common for hyperthyroid cats to be underweight and exhibit an unkempt appearance
Surely the best cat food for older cats with hyperthyroidism, Hill's Y/D food (whether wet or dry) can be a superb way to treat your cat's hyperthyroidism. This food will only be effective if your cat has no other food source Q: I have been managing several older cats with hyperthyroidism. Please provide some practical updated information about feline hyperthyroidism. Table 1 . A: Hyperthyroidism occurs most often in middle-aged to geriatric-aged cats. Most feline cases of hyperthyroidism are the result of hyperplastic or benign adenomatous thyroid glands; thyroid carcinomas are uncommon and found in only 1-2. Diagnosis of hyperthyroidism. Your vet would have confirmed the diagnosis by taking a complete history, performing a physical examination and requesting blood tests. Not all cats will have an obvious enlarged thyroid gland present, some cats have overactive thyroid tissue in an unusual (ectopic) site, often within the chest cavity About Hyperthyroidism. Hyperthyroidism was not recognised as a problem in cats until 1979. It is now considered a common disease of cats. Both male and female cats are equally affected. It is thought that Siamese and Himalayan cats have a decreased risk of developing hyperthyroidism Hyperthyroidism in cats is diagnosed by measuring the level of thyroid hormones in the cat's blood serum. If your veterinarian suspects that hyperthyroidism could be a cause of your cat's symptoms, he or she will take a blood sample from your cat to measure the high basal serum total thyroid hormone concentration
Older cats are more vulnerable to hyperthyroidism (starting from 12-13 years onward). However, this disorder is not breed or gender specific. Some of the commonly noted symptoms of hyperthyroidism include weight loss, increased appetite, vomiting, diarrhea, weakness, poor coat quality (greasy or matted fur), hyperactivity, restlessness, among others Hyperthyroidism is very common in older cats, the average age of a cat that develops the condition is between 12 and 13 years. If left untreated, the issue can cause serious problems for your cat's heart and kidneys. Causes of hyperthyroidism. In most cases, hyperthyroidism is caused by benign growths called an adenoma If my cat has her hyperthyroidism well maintained (she's on meds and the last blood work was good), shouldn't she be able to gain weight, or at least stop losing more? Shouldn't all of her hyperthyroidism signs (increase thirst/hunger and lost weight) be minimum? More details: My spayed female cat is about 16 years old The number of cats diagnosed with hyperthyroidism in 1980 was one in 200. Today it's estimated that one in 10 cats are afflicted. For the Oregon State study, a silicone pet tag developed by Kim.
http://healthypets.mercola.com/sites/healthypets/archive/2010/07/14/feline-hyperthyroidism.aspx - Dr. Karen Becker, a proactive and integrative wellness vete.. Cat Number 1000. The Hyperthyroid Cat Centre March 8, 2018 . Cookie at HCC **CAT No. 1000** - We are proud to announce that Little Cookie went home yesterday cured of Hyperthyroidism. Cookie is the 1000th cat treated at our Centre - a real milestone for 'breaking down barriers to radio-iodine'. Find out mor Since cat hyperthyroidism has such an impact on so many organs and physiological functions, it can become extremely dangerous if left untreated, even fatal. Therefore, if your cat is exhibiting any of the above signs or symptoms, it's vital to contact your veterinarian and have your pet examined as soon as possible
However, if your vet confirms that your cat has hyperthyroidism, it is important to treat the condition and not simply leave it, or wait and see how it progresses; as without treatment, hyperthyroidism can have an acute impact on your cat's general health and quality of life, and can go on to cause very serious problems like heart failure, and even result in eventual death If you have an older cat with increased appetite, but also with weight loss then they likely have hyperthyroidism. This is a very common cat disease, primarily affecting middle aged to older cats. In this article I will explain what hyperthyroidism is, going over the most common signs and causes. I will then cover your options for treatment, including the most effective natural solutions As stated above, symptoms of hyperthyroidism in cats usually appears at about 7 years of age. It is difficult to estimate life expectancy because much of the outcome depends on how old the cat was when the hyperthyroidism was diagnosed, the seriousness of the overactive hormone and whether the condition was treated or not Hyperthyroidism is probably the second most common disease that we can see in older cats. The exact causes are unknown despite continuing research. The good news is that not only is it manageable with medication or diet, but it is potentially curable with surgery or radioactive iodine treatment
An oral solution for treating hyperthyroidism in cats has been launched by Norbrook. Thyronorm Oral Solution for Cats is a liquid alternative to tablets and is licensed for the long-term treatment of feline hyperthyroidism and the stabilisation of hyperthyroidism in cats prior to surgical thyroidectomy Cats that preferred fish flavored or liver or giblets-flavored cat food had an increased risk of developing hyperthyroidism. There was also a threefold increase in risk among cats using cat litter. Exposure to fertilizers, herbicides, plant pesticides, or flea control products or the presence of a smoker in the home were not significantly associated with an increased risk of developing. Hyperthyroidism disease in pets is more common in aging cats and is caused by an excess of thyroxin, a thyroid hormone. Cats with hyperthyroid disease will usually have a ravenous appetite yet are considerably thin due to overwhelming amount of thyroxin being produced Hyperthyroidism is a very common disease in cats, most commonly affecting middle-aged to older cats.. Symptoms and Diagnosis of Hyperthyroidism in Cats. Hyperthyroidism is caused when an enlarged thyroid gland (located in a cat 's neck) is producing an excess of thyroid hormones (T3 and T4). When produced properly thyroid hormones help regulate and control normal bodily function
What is hyperthyroidism? Hyperthyroidism is excessive production of the thyroid hormone in the body due to the presence of a benign tumour (95-98% of cases) in the thyroid gland. It is one of the most common hormonal disorders in cats. Hyperthyroidism may occur in dogs as well although rarel Cat hyperthyroidism, an endocrine disorder, can be treated with methimazole, I-131 radiation therapy, surgery or an iodine-restricted diet. Read more Hyperthyroidism can occur in any breed of cat and usually occurs when cats get to 12 or 13 years old. Hyperthyroidism is caused by too much thyroid hormone T 4 in the bloodstream. Usually, a benign tumor causes the thyroid gland to over-produce thyroid hormones which in turn causes the heart to beat faster