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5 Best Cat Foods for Hyperthyroidism in 2021 – Reviews & Top Picks

brown kitten eating wet cat foodIf your cat has hyperthyroidism, it means that his thyroid gland is making too many hormones. However, abnormally high production of thyroid hormones can affect your cat’s health: weight loss, high blood pressure, or even hyperactivity are possible. To treat this disease, lifelong medical treatment is often administered. Surgery or treatment with radioactive iodine may also be considered and thus allow complete recovery. However, these are seldom practiced. There is, however, one alternative solution: managing your kitty’s diet!

So, to help you find the best cat food for hyperthyroidism, we’ve reviewed and picked 5 options. These reviews will guide you through your purchase and hopefully help you find the food that suits your precious kitty’s needs.

Important: before changing the diet of your cat suffering from hyperthyroidism, the advice of your veterinarian is essential!

A Quick Comparison of Our Favorites

Rating Image Product Details
Best Overall
Winner
Instinct Original Grain-Free Pate Real Chicken Recipe Wet Canned Cat F Instinct Original Grain-Free Pate Real Chicken Recipe Wet Canned Cat F
  • High in protein
  • Grain-free
  • Natural
  • Best Value
    Second place
    Tiki Cat Hanalei Luau Wild Salmon Tiki Cat Hanalei Luau Wild Salmon
  • Budget-friendly
  • High protein for cats recovering from hyperthyroidism
  • Provides essential moisture to keep your cat hydrated
  • Third place
    Hill's Prescription Diet y/d Thyroid Care Hill's Prescription Diet y/d Thyroid Care
  • Formulated by veterinarians
  • Can restore thyroid health in 3 weeks
  • High-quality ingredients
  • Feline Natural Chicken & Venison Feast Feline Natural Chicken & Venison Feast
  • High in protein
  • All-natural formula
  • Low in carbs
  • Hill's Prescription Diet y/d Thyroid Care Original Hill's Prescription Diet y/d Thyroid Care Original
  • Best dry food available on the market
  • Clinically proven
  • Help balance the thyroid of your cat
  • The 5 Best Cat Foods for Hyperthyroidism – Reviews & Top Picks 2021

    1. Instinct Original Grain-Free Pate Real Chicken Recipe Wet Canned Cat Food – Best Overall

    Instinct Original Grain-Free Pate Real Chicken Recipe Wet Canned Cat Food

    Iodine content:  Low
    Sodium content:  High
    Omega-3 fatty acids content:  High

    Instinct Original Grain-Free Pate is the best overall cat food for hyperthyroidism. It’s high in natural meat protein, without soy, corn, artificial colors, or preservatives. Therefore, this is a great product that can help your cat gain weight and regain energy, especially if he is taking medication to treat his overactive thyroid.

    This paté contains carefully balanced and healthy ingredients, including real chicken, fruits, and vegetables, as well as natural sources of omega fatty acids to help promote a shiny coat and healthy skin. It is also not too expensive for such a good product recommended by vets. However, it may not be indicated for cats with kidney disease due to its high protein content.

    Pros
    • High in protein
    • Grain-free
    • Natural

    Cons

    • Not appropriate for cats with kidney disease


    2. Tiki Cat Hanalei Luau Wild Salmon – Best Value

    Tiki Cat Hanalei Luau Wild Salmon in Salmon Consomme Grain-Free Canned Cat Food

    Iodine content:  Medium
    Sodium content:  High
    Omega-3 fatty acids content:  High

    Although it has a slightly higher iodine content than the previous option, Tiki Cat Hanalei Luau Wild Salmon is the best value for money. However, since wild-caught flaked Alaskan salmon is the first ingredient, it provides a lot of moisture. This helps keep your cat hydrated and supports their digestive and urinary health. Additionally, it is a veterinarian-recommended product for cats recovering from iodine radioactive therapy.

    Pros
    • Budget-friendly
    • High protein for cats recovering from hyperthyroidism
    • Provides essential moisture to keep your cat hydrated

    Cons

    • High-fat content
    • Higher iodine levels


    3. Hill’s Prescription Diet y/d Thyroid Care – Premium Choice

    Hill's Prescription Diet y_d Thyroid Care

    Iodine content:  Low
    Sodium content:  Low
    Omega-3 fatty acids content:  High

    This product is by far the best for cats with hypothyroidism as it has been clinically proven to be effective. In particular, it improves the functioning of your feline’s thyroid in just three weeks, thanks to its balanced iodine formula. In addition, it helps maintain healthy kidneys, support heart function and keep your cat’s coat shiny and healthy. However, it is also at the high end of canned cat food. Also, you will need your veterinarian’s authorization before purchasing the product online, which can be inconvenient at the time. However, this allows you to get the advice and approval of your vet before buying this premium product.

    Pros
    • Formulated by veterinarians
    • Can restore thyroid health in 3 weeks
    • High-quality ingredients

    Cons

    • Expensive
    • Veterinary authorization needed


    4. Feline Natural Chicken & Venison Feast – Best for Senior Cats

    Feline Natural Chicken & Venison Feast (1)

    Iodine content:  Not specified
    Sodium content:  Medium
    Omega-3 fatty acids content:  High

    Feline Natural is a food of choice for senior cats due to its high protein content that is easily digestible, its low carbohydrate content, which is ideal for insulin-resistant cats, and its all-natural ingredients.

    However, although this product is specially formulated to improve the health of older cats, it is still costly. Nonetheless, senior cats generally have lower energy requirements than younger cats, which means this product will last you longer.

    Pros
    • High in protein
    • All-natural formula
    • Low in carbs

    Cons

    • Some cats may not like its taste
    • Pricey


    5. Hill’s Prescription Diet y/d Thyroid Care Original – Best Dry Food

    Hill's Prescription Diet y_d Thyroid Care Original

    Iodine content:  Low
    Sodium content:  Low
    Omega-3 fatty acids content:  High

    So far, all of our options have been canned foods. This is because canned food is ideal because of its high water content, which helps counteract your cat’s tendency to overproduce urine due to its high levels of thyroid hormones. However, since it is the only food on the market that is formulated to reduce symptoms of hyperthyroidism, we have chosen Hill’s Prescription Diet y/d Thyroid Care as the best dry cat food for hyperthyroidism.

    Pros
    • Best dry food available on the market
    • Clinically proven
    • Help balance the thyroid of your cat

    Cons

    • Veterinary authorization needed
    • Expensive


    Buyer’s Guide

    Is There a Special Diet for Cats With Hyperthyroidism?

    Yes, there is a diet designed especially for cats with hyperthyroidism. But, again, you must consult your veterinarian before changing your pet’s diet. Let’s take a look at the qualities of a top-choice food for felines suffering from this illness and what to look for when shopping for your cat’s food.

    persian cat eating dry food
    Image Credit: Patrick Foto, Shutterstock

    1. Reduces Iodine In Your Cat’s Diet

    Recently, an iodine-depleted diet, available only by prescription, has been developed for cats with hyperthyroidism. Indeed, an iodine intake is necessary for the production of thyroid hormones. Therefore, by reducing the levels of iodine in food, you can limit the number of thyroid hormones produced by the animal.

    Usually, a cat’s body begins to decrease its production of thyroid hormones as early as the third week of this diet. And that production may return to normal after a few months.

    2. Feed Your Cat Exclusively Iodine-Free Foods

    If you are starting to feed your hairball with food without iodine, it is essential that you give it just that. Indeed, if you were to feed it with traditional cat food, treats, or table scraps, the diet would be ineffective. And this even in small quantities!

    3. Make Sure Your Cat Can’t Hunt

    Likewise, if your cat has access to the outdoors and hunts and eats prey, such a diet is not an option. Indeed, here too, your feline would increase its iodine level in its body. All the efforts made before would then be wasted.

    orange cat eating bird
    Image Credit: rihaij, Pixabay

    4. Favor Canned Food

    Since your cat produces too much thyroid hormone, she may tend to drink and urinate more often.

    In this case, do not hesitate to favor canned moist foods (patés). Indeed, the latter has a higher water content than dry foods (kibble). This may make your feline produce less urine.

    5. Choose Foods Rich In Protein

    One of the most common symptoms of hyperthyroidism in cats is increased appetite accompanied by weight loss. This is because hyperthyroidism speeds up the metabolism; the animal then burns its calories even before its body has been able to absorb them and transform them into energy.

    If your cat has lost a lot of weight as well as a large part of its muscle mass, then it is essential that it put on weight. To do this, consider choosing foods rich in protein. However, be careful to ensure that the proteins are of high quality!

    Conclusion

    Having a cat with hyperthyroidism can be heartbreaking for any cat owner. However, these kitties can have happier and healthier lives when their caregivers know about the disease and its food management. This is why we have reviewed the best cat food to give to your feline so that you can avoid, as much as possible, the often lengthy and expensive drugs and treatments. Hill’s Prescription Diet y/d Thyroid Care Canned and Dry Food are the only options specially formulated to reduce the iodine content in your cat’s diet. However, since these options are rather expensive, you can opt for Instinct Original Grain-Free and Tiki Cat Hanalei Luau Wild Salmon, also recommended by vets.


    Featured Image Credit: MaraZe, Shutterstock