How to Make a Hyperthyroid Cat Gain Weight

Hyperthyroidism is one of the most common disorders for cats and should be carefully considered. According to Dr. Mark E. Peterson, it can be easier, especially if you are going to serve the right meal for your cats. It is important to focus on the food they a have to manage their condition. However, the common challenge for many owners is that they would not know the right diet to follow.

The cat would require a higher amount of protein in their diet. If you are dealing with the hyperthyroid condition, this can be the first thing you have to keep in mind. Make sure that there would be a balanced high level of protein in their diet as it is necessary for maintaining their muscle mass.

Most of the cats that are suffering from this condition would also be prone to developing diabetes. It can be a great help if you can manage their insulin activity and get foods with less sugar content. It is recommended to focus on the ingredients added and you may need to check if getting supplements is necessary. For a better understanding of how to make a hyperthyroid cat gain weight, there are some things you should know.

How to Make a Hyperthyroid Cat Gain Weight Comparison Table

NameMain IngredientsProteinFatFiberPricing
Canidae Grain-Free PURE Ocean Indoor FormulaSalmon, salmon meal, menhaden fish meal, potatoes, peas, canola oil, sweet potatoes, plus natural flavor, vitamins, minerals and probiotics mix32%17%3%Click Here
Wellness CORE Grain-Free Original RecipeDeboned Turkey, Deboned Chicken, Turkey Meal, Chicken Meal, Peas, Herring Meal45%18%3%Click Here
Nature’s Recipe Grain-Free Chicken RecipeChicken, Chicken Meal, Potatoes, Turkey Meal, Fish Meal, Poultry Fat (preserved with mixed tocopherols)37%15%7%Click Here
The Honest Kitchen’s Grace Turkey RecipeDehydrated Turkey, Dehydrated Eggs, Dehydrated Pumpkin, Dehydrated Potatoes, Dried Parsley, Dehydrated Kale38.5%34.5%2.5%Click Here
Stella and Chewy’s Freeze Dried FoodDuck with Ground Bone, Turkey, Turkey Liver, Goose, Turkey Gizzard, Pumpkin Seed, Potassium Chloride40%30%2%Click Here
Instinct Raw Boost Grain-Free RecipeChicken, Chicken Meal, Turkey Meal, Menhaden Fish Meal, Peas, Chicken Fat (preserved with Mixed Tocopherols and Citric Acid)43%20%3.5%Click Here
Primal Pet Foods Freeze-Dried Feline Chicken and Salmon FormulaChicken, Chicken Necks, Chicken Gizzard, Salmon, Chicken Livers, Organic Kale52%32%1%Click Here
Merrick Backcountry Dry Cat FoodDeboned Chicken, Chicken Meal, Turkey Meal, Potatoes, Peas, Natural Flavor, Salmon Meal (source of Omega-3 fatty acids)42%14%4%Click Here

Canidae is one of the reliable companies that are being considered by many company owners. If you are looking for a meal that is grain-free, then they have one for you! The Canidae Grain-Free PURE Ocean Indoor Formula can assure you that it does not come with grains and is perfect for the needs of your cats.

It makes it easier for your cats to chew and get every bit of nutrients it can offer. It does not have gluten that may also cause problems to the current condition of your cat. The formula comes with salmon, tuna and menhaden fish meal. It comes with other ingredients including sweet potatoes, chickpeas, and lentils.

It is limited ingredient diet that can be effective for cats that are dealing with hyperthyroid.


  • It comes with limited ingredients that can benefit the needs of your cats.
  • It makes use of high protein sources.
  • It comes with healthy fibers that could promote better digestion for your cats.
  • It does not come with grains.


  • It comes with sweet potatoes that can be high in carbohydrates.
  • It is not recommended for kittens to avoid them in being picky eaters.

When it comes to specialized meals and formulas, Wellness has been popular and known in the market to offer that to their consumers. If you are looking for a grain-free product from the company, then you can try and look for the Wellness CORE Grain-Free Original Recipe. This is a highly recommended meal by many veterinarians and it does not come with grains.

It can offer high protein source coming from various ingredients such as deboned chicken, deboned turkey, whitefish and herring meal. This can offer a high level of protein that can be effective for the needs of your cats. It comes with amino acids that can also help to promote and improve their immune system.

However, it contains peas and potatoes that can be high in carbohydrates. It is being offered with extra antioxidants, so it can be ideal for the overall wellness and needs of the cat.


  • It offers a high level of proteins.
  • It contains antioxidants for boosting the immune system of your cats.
  • The ingredients used are all tasty and appetizing for your cats.
  • It does not come with grains.


  • It comes with tomatoes that can cause allergies in cats.
  • There are added ingredients like peas and potatoes.

Nature’s Recipe is a popular company that was able to keep their name by providing a high quality of meals for their consumers. It adds the right nutrients that your cat needs through their specialized meals that are formulated according to their sensitivities. Over the years, they have been offering various meals that would be a perfect choice for your cat.

When it comes to hyperthyroid, the first product that you can have from them is the Nature’s Recipe Grain-Free Chicken Recipe. It is one of their premium cat food that is grain free and can be sufficient for the needs of your cats. It contains chicken and chicken liver to offer the best quality of proteins and fats that your cat needs.

It has other supplementary oils and fats that could provide better nutrients. It also has other ingredients such as guar gum and carrots.


  • It is being offered with high levels of proteins.
  • It does not come with any grains.
  • There are no food color, preservatives and other ingredients that may cause problems to your cats.
  • It is a well-balanced meal.


  • There are cats that can be allergic to carrots.
  • It does not come with chelated minerals.

If this is the first time you’ve heard about the Honest Kitchen, then you are missing the possible benefits that their meals and products would offer to your cats. Despite being a small company, they have offered quality meals that went through quality control and they were able to maintain that until today. This sounds promising for the current needs of your cats.

One of the best meals that the company would offer is The Honest Kitchen’s Grace Turkey Recipe. It comes with healthy and quality ingredients that would be efficient for the current condition of your cat. It is being offered with high levels of protein and low carbs. Just perfect for their hyperthyroidism.

It comes with quality ingredients including turkey and eggs. These ingredients would offer a high level of protein and also add amino acids for better strength and overall well-being of your cats. Some of the other ingredients include cranberries and pumpkins.


  • It uses ingredients that are rich in protein.
  • It is a specialized formula for the needs of the cats.
  • It has low carb content.
  • It promotes overall well being of your cats.


  • There are no chelated minerals added.
  • There are cats that have allergies on pumpkins or cranberries.

Another formula that you can serve to your cats is the Stella and Chewy’s Freeze Dried Food. We all know that would prefer raw foods because it can be tasty and flavorful for their needs. They would be interested as it may also come with the right protein level that their body would require. It is a perfect diet that comes with fats, vitamins, and nutrients to fit the needs of your cats.

The meats used to come from organic poultry and have been proven to be safe and natural for your cats. It does not come with antibiotics, hormones, artificial flavorings and other ingredients that may harm your cats. It is highly recommended for cats that have a sensitive stomach or experiencing diarrhea.

This meal is very recommended by many veterinarians on the market and make sure to serve it with fresh, and clean water!


  • It is all natural and does not come with preservatives.
  • It offers a high level of proteins needed by your cats.
  • It is perfectly formulated with right vitamins and minerals.
  • It is easily digestible.


  • There are cats that don’t like the texture.
  • You may need to control the water consumption of your cat to keep them hydrated.

We all know that Nature’s Variety is reliable when it comes to the right food for your cats. If you are changing their meals to a raw diet because of their condition, then Instinct Raw Boost Grain Free Recipe is ideal for your needs. It is a highly recommended raw cat food diet that is rich in nutrients and minerals.

The Instinct Raw Boost Grain Free Recipe comes with fats, minerals, acids, antioxidants, probiotics and everything that your cat would require. There is no doubt that it can be the right choice you can consider. It is a well-balanced diet to help cats with their current condition.

This meal does not come with grains and recommended for cats of all ages.


  • It is a quality raw diet food.
  • It does not come with grains and other preservatives.
  • It is recommended for cats of all ages.
  • It helps in supporting your cat’s immune system.


  • There are cats that would become totally dependent on this meal.

If you are worried about the condition of your cat, the best thing to do is to switch their diet to a healthier alternative. A raw food diet for cats can greatly help in letting them have the exact nutrients their body would require, and avoid the risk of more complications.

The Primal Pet Foods Freeze-Dried Feline Chicken and Salmon Formula is greatly recommended to ensure the overall health and well-being of your cats. They ensure to use fresh ingredients to keep your cat healthy and get a high level of proteins and minerals.

This meal comes with chicken and salmon without antibiotics, which makes it safe and nutritious. There are also no added ingredients or preservatives on this.


  • It comes with all natural ingredients.
  • It makes use of fresh ingredients and offers a high level of proteins.
  • It is grain free and sufficient for the needs of your cat.
  • It is recommended for cats of all ages.


  • There is a risk for your cats to be picky eaters because of this.

Merrick is gaining popularity because of their raw food meals. It is a good choice for cat owners that would like to focus on the overall nutrition of their cats and would need extra vitamins and minerals. The number one ingredient used is real deboned chicken.

The pieces are freeze-dried to ensure that the nutrients of it are all inside and locked in. It does not come with other ingredients that can be harmful to your cats such as gluten and grains. It is very easy to digest and contains fatty acids for best benefit.

It can also help in letting your cat maintain shiny and beautiful fur.


  • It uses real deboned chicken as the main ingredient.
  • It does not have gluten and grains to worry about.
  • It gives real nutrients that your cat needs.
  • It is safe and trusted by many cat owners.


  • It comes with bits that can be hard to chewed by senior cats.
  • There are cats that would not like the texture and taste of it.

Metabolic Issues of Hyperthyroid Cats

If this is the first time that you’ve heard about this condition, you have to be careful and determine the possible effects on your cat’s body. Having hyperthyroid cat would let you deal with more problems and it is important to discuss this with your veterinarian. Some metabolic issues include the following below:

  • Muscle wasting and weight loss: Most cats would start to lose their weight. They would have a hard time in eating and would eventually lose their appetite. Over time, the condition would lead to starvation and it can be troublesome. Their muscles would start to give them a hard time in moving around, and they may need your assistance.
  • Diabetes and Glucose Intolerance: Aside from the muscle wasting and weight loss, it can also cause implications on the metabolic systems of the cats. It can let your cat be prone to diabetes and glucose intolerance. It is important to have a successful treatment as early as now.

What Are the Symptoms to Look For?

There are many cats that would start to show signs that you need to be aware. They would start to lose weight and have enlargement of the thyroid. Because of the effect of the hormones in the brain, you would also be noticed that your cats would end up being over energetic. There are cases that they will show aggression to you.

On the other hand, there are other cats that would show symptoms such as increased heart rate, vomiting, diarrhea, muscle weakness and a whole lot more. If you think there is something wrong with your cat, it is the best to spend time and consult your veterinarian. They would be able to tell and give you more knowledge about the condition.

What to Feed Your Hyperthyroid Cats?

Cats are known to prefer natural raw diets, which is similar to what they have in the wild. They may require a strict diet for energy coming from the right animal fat and protein sources. If your cat is used in this diet, then you can expect for them to eat small animals like rodents and birds. It is important that you will spend time in checking the different options available and get a meal that would be the same on the nutritional facts of their common meals.

There could be a number of options available on the market, which make you wonder on the right one for your cats. If they are suffering from hyperthyroid, the best thing is to avoid dry and canned foods. You have to focus on giving them meals that are high in protein and does not come with preservatives or ingredients that can irritate or possibly make their situation worst.

Grain-based meals are not also recommended because it can be harmful to your cats. They would have a hard time in digesting the meals and give you problems later.

Nutritious Food

If you don’t know, cats would be able to survive without having carbs on their diet, and if you are interested in giving them the right meals, here are some recommendations that would give an answer on how to make a hyperthyroid cat gain weight.

Quick Tips to Change Your Cat’s Diet

If you are searching for the right meal to fit your cat’s current condition, it is important to have a proper transition. They can have sensitive right now, and you have to plan ahead of time. For better transition, make sure to consider the following:

  1. You have to serve the meal in small portions and let your cat get used on the smell of it.
  2. You can have it in between of their current meal, so you’ll know if they will be interested or not.
  3. You have to make sure that there would be sufficient water that would keep them hydrated. Most cats would prefer to have water instead of their meals during this time.
  4. You can ask for supplements and any other options available, so they can still have complete nutrition.

The Round Up

It won’t be hard to know how to make a hyperthyroid cat gain weight. There would be different ways that you can consider, and the most important is to serve a quality meal that could help them. You have to choose one that comes with the right amount of protein and other minerals to support their needs.

Rebecca Welters

Yes, I am that weird cat lady with 200 cats and live in the darkest corner of the city where no one dares to go! Joking! But I am a cat lover and have 2 Ragdoll cats called Toby, he's 3 years old and Dory, she's 8 years old. I'm 36 years old and live in the quiet town of Washington. does not intend to provide veterinary advice. We go to great lengths to help users better understand their cats; however, the content on this blog is not a substitute for veterinary guidance. Always consult a vet.

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