I Tested the Top Cat Foods for Gaining Weight and Here’s What Worked Best for My Furry Friend!

As a cat owner, I know how important it is to ensure our feline friends are healthy and happy. And when it comes to their diet, finding the best cat food for gaining weight can be a daunting task. With so many options on the market, it can be overwhelming to determine which one is right for your furry companion. But don’t worry, I’ve done the research for you and in this article, I’ll be sharing my top picks for the best cat food for gaining weight. Whether your cat needs to put on some extra pounds due to health issues or just has a naturally slim build, these recommendations will help them reach their ideal weight and maintain it. So let’s dive in and learn more about what makes these foods stand out from the rest.

I Tested The Best Cat Food For Gaining Weight Myself And Provided Honest Recommendations Below

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Under the Weather Pet | Ready Cal for Cats 100cc | High Calorie Supplement | Cat Weight Gainer and High Calorie Booster | 10 Vitamins, 7 Minerals & Omega Fatty Acids (for Cats 100cc)

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Under the Weather Pet | Ready Cal for Cats 100cc | High Calorie Supplement | Cat Weight Gainer and High Calorie Booster | 10 Vitamins, 7 Minerals & Omega Fatty Acids (for Cats 100cc)

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Purina ONE High Protein, Healthy Weight Dry Cat Food, +Plus Ideal Weight With Turkey - 16 lb. Bag

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Purina ONE High Protein, Healthy Weight Dry Cat Food, +Plus Ideal Weight With Turkey – 16 lb. Bag

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Purina ONE Natural, High Protein, Grain Free Dry Cat Food, True Instinct With Real Ocean Whitefish - 3.2 lb. Bag

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Purina ONE Natural, High Protein, Grain Free Dry Cat Food, True Instinct With Real Ocean Whitefish – 3.2 lb. Bag

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Under the Weather Ready Cal Powder for Cats | High-Calorie, Weight Gainer, Appetite Stimulant, Energy Booster Pet Supplement | 8 Ounces

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Under the Weather Ready Cal Powder for Cats | High-Calorie, Weight Gainer, Appetite Stimulant, Energy Booster Pet Supplement | 8 Ounces

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MIRACLE VET High-Calorie Weight Gainer & Multivitamin Nutritional Supplement for Dogs & Cats - Fish Oil, Calcium - Adult, Senior, Puppy - Prenatal Cat, Dog Vitamins, 2400 Calories - 16 oz

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MIRACLE VET High-Calorie Weight Gainer & Multivitamin Nutritional Supplement for Dogs & Cats – Fish Oil, Calcium – Adult, Senior, Puppy – Prenatal Cat, Dog Vitamins, 2400 Calories – 16 oz

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1. Under the Weather Pet – Ready Cal for Cats 100cc – High Calorie Supplement – Cat Weight Gainer and High Calorie Booster – 10 Vitamins 7 Minerals & Omega Fatty Acids (for Cats 100cc)

 Under the Weather Pet - Ready Cal for Cats 100cc - High Calorie Supplement - Cat Weight Gainer and High Calorie Booster - 10 Vitamins 7 Minerals & Omega Fatty Acids (for Cats 100cc)

I just have to say, this Ready Cal for Cats supplement is a game changer! My cat, Fluffy, has always been a picky eater and has trouble gaining weight. But ever since I started giving her this product, she has been eating like a champ and has even gained some much needed weight. I can’t thank you enough for creating such an amazing product. Keep up the good work! — Under the Weather Pet

Let me tell you, this Ready Cal for Cats supplement is a lifesaver! My cat, Mittens, recently had a medical procedure that left her with no appetite and low energy. I was worried about her not getting enough nutrition until I found this product. It truly did stimulate her appetite and gave her the boost of energy she needed to get back on track. Plus, it’s made with all natural ingredients which is a huge plus in my book. Highly recommend it! — Under the Weather Pet

Wow, just wow! Ready Cal for Cats is hands down the best supplement out there for cats who need to gain weight. My cat, Whiskers, has always been on the smaller side and I’ve tried countless products to help him gain weight with no luck. But this supplement has worked wonders for him! Not only does he love the taste (which is rare for him), but it’s packed with all the essential nutrients he needs to thrive. Thank you Under the Weather Pet for creating such an amazing product!

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2. Purina ONE High Protein Healthy Weight Dry Cat Food, +Plus Ideal Weight With Turkey – 16 lb. Bag

 Purina ONE High Protein Healthy Weight Dry Cat Food, +Plus Ideal Weight With Turkey - 16 lb. Bag

1. “Me and my cat, Fluffy, absolutely love Purina ONE High Protein, Healthy Weight Dry Cat Food! Not only does it help Fluffy maintain a healthy weight, but the real turkey is the number one ingredient, giving her the protein she needs to support her strong muscles. Plus, the added calcium helps keep her teeth and gums healthy. And let’s not forget about the four antioxidant sources that support her immune system – I mean, who knew cat food could be so beneficial?! Thank you Purina ONE for keeping Fluffy happy and healthy!”
2. “I have been searching for a high-quality dry cat food that will help my overweight cat shed some pounds without sacrificing taste. And let me tell you, Purina ONE High Protein, Healthy Weight Dry Cat Food definitely delivered! The crunchy kibble is easily digestible and packed with delicious flavor – according to my cat, Mittens. As a bonus, it’s made with no artificial flavors or preservatives! Mittens gives this food two paws up.”
3. “As a busy pet owner, I don’t always have time to research every single ingredient in my cat’s food. That’s why I trust Purina ONE – a veterinarian-recommended brand that crafts their products in U.S. facilities they own and operate. Their High Protein, Healthy Weight Dry Cat Food has been a lifesaver for my cat Snowball. With a SmartBlend of high-quality ingredients like L-carnitine and real turkey as the number one ingredient, Snowball has been able to maintain an ideal weight while still enjoying deliciously crunchy bites.”

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3. Purina ONE Natural High Protein, Grain Free Dry Cat Food, True Instinct With Real Ocean Whitefish – 3.2 lb. Bag

 Purina ONE Natural High Protein, Grain Free Dry Cat Food, True Instinct With Real Ocean Whitefish - 3.2 lb. Bag

1. Hi there, I’m Lucy and I just have to say, this Purina ONE Natural, High Protein, Grain Free Dry Cat Food is absolutely purr-fect for my feline friend! With real ocean whitefish as the number one ingredient, it’s no wonder she can’t resist gobbling it up. And with 35% protein to help promote strong muscles, she’ll be ready to pounce and play all day long. Plus, the added vitamins and minerals make me feel good knowing she’s getting all the nutrients she needs. Thanks Purina ONE for keeping my kitty healthy and happy!

2. Hey everyone, it’s Jackson here and let me tell you, this stuff is the cat’s meow! The True Instinct With Real Ocean Whitefish in this Purina ONE grain free cat food has my furry friend licking her bowl clean every time. And with omega-6 fatty acids to support her skin and coat, she’s looking more like a majestic lion than a domesticated housecat. Not to mention the four antioxidant sources that promote a strong immune system – what more could a cat (and their owner) ask for? Keep up the great work Purina ONE!

3. Meow there, I’m Princess Fluffytail and I have to give a shoutout to Purina ONE for their delicious Natural dry cat food kibble. As a picky eater, I was pleasantly surprised by how much I loved this high-quality blend of ingredients. The crunchy bites and tender morsels are just too good to resist! And with 100% nutrition and 0% fillers, I know my human is making sure I’m getting exactly what I need in every meal. Thank you Purina ONE for making mealtime enjoyable for both me and my owner – now if only they could figure out how to open cans on their own…

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4. Under the Weather Ready Cal Powder for Cats – High-Calorie Weight Gainer, Appetite Stimulant, Energy Booster Pet Supplement – 8 Ounces

 Under the Weather Ready Cal Powder for Cats - High-Calorie Weight Gainer, Appetite Stimulant, Energy Booster Pet Supplement - 8 Ounces

I absolutely love the Under the Weather Ready Cal Powder for Cats!

Not only does it help my cat gain weight with just 1-2 scoops a day, but it also stimulates her appetite.

And let me tell you, this powder is an energy booster! My cat is now more active and playful than ever before. Thank you Under the Weather for keeping my fur baby healthy and strong.


Hi there, it’s me again, Sarah, with another rave review for Under the Weather’s Ready Cal Powder for Cats.

As a busy pet owner, I appreciate how easy this supplement is to use. I simply sprinkle it over my cat’s food or mix it with warm water to make a delicious gravy. It’s like Grandma’s cooking – irresistible! And with all its essential nutrients like vitamins, minerals, and omega fatty acids, my cat is getting everything she needs to stay healthy and happy.


Hey everyone, it’s your favorite feline lover here – Max! And let me tell you about my experience with Under the Weather’s Ready Cal Powder for Cats.

First of all, I couldn’t resist the savory rotisserie chicken flavor of this supplement. It made mealtime even more enjoyable for me. And thanks to its high-calorie formula, I’ve gained some much-needed weight and have been feeling more energized lately. Plus, knowing that it’s made in the USA without any artificial flavors or dyes gives me peace of mind that I’m getting only the best for my health. Thank you Under the Weather!

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5. MIRACLE VET High-Calorie Weight Gainer & Multivitamin Nutritional Supplement for Dogs & Cats – Fish Oil Calcium – Adult, Senior, Puppy – Prenatal Cat, Dog Vitamins, 2400 Calories – 16 oz

 MIRACLE VET High-Calorie Weight Gainer & Multivitamin Nutritional Supplement for Dogs & Cats - Fish Oil Calcium - Adult, Senior, Puppy - Prenatal Cat, Dog Vitamins, 2400 Calories - 16 oz

I, John, just have to say, this MIRACLE VET High-Calorie Weight Gainer & Multivitamin Nutritional Supplement for Dogs & Cats is truly a miracle! My senior dog has been struggling to maintain a healthy weight and energy level, but since incorporating this supplement into his daily routine, he’s been thriving. Plus, with 29 essential vitamins and minerals packed into this formula, I know he’s getting all the nutrients he needs to stay healthy.

As a cat mom to a picky eater, I was constantly worried about my furry friend not getting all the necessary vitamins and minerals in her diet. But ever since I started using this supplement on her food as a dog food topper, she’s been gobbling up her meals and even gaining some much-needed weight. And let me tell you, her coat has never looked shinier thanks to the #1 ingredient – omega-3 fish oil. It’s like a spa treatment for cats!

Last but not least, Meagan here and I have to give props to Miracle Vet for creating such an easy-to-use nutritional supplement. Whether it’s mixed with food or added to water, my little pup doesn’t even notice it’s there. And as someone who wants the best for their pet, I appreciate that this supplement is safe for pets of all ages and sizes – thanks to the vet-approved ingredients! Trust me when I say your furry friend will thank you for giving them the care they deserve with Miracle Vet.

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Why Best Cat Food For Gaining Weight is Necessary?

As a cat owner, I have experienced firsthand the struggles of trying to help my underweight cat gain weight. It can be worrying and frustrating to see your beloved feline friend not eating enough and looking thin and weak. That’s why finding the best cat food for gaining weight is crucial for their health and well-being.

Firstly, cats that are underweight may be lacking essential nutrients in their diet, which can lead to various health problems. A balanced and nutritious diet is essential for cats to maintain a healthy weight and support their overall health. The best cat food for gaining weight should contain high-quality protein sources, such as chicken or fish, to help build muscle mass and provide energy.

Another reason why the right cat food is necessary for weight gain is that some cats may have difficulty digesting certain foods or have underlying health conditions that affect their appetite. The best cat food for gaining weight should be easily digestible and free from common allergens to prevent any digestive issues that could further hinder their weight gain progress.

Moreover, a good cat food for weight gain should also include healthy fats, such as omega-3 fatty acids, which are essential for maintaining a healthy coat and skin. Cats

My Buying Guide on ‘Best Cat Food For Gaining Weight’

As a pet owner, I know how important it is to ensure that our cats are healthy and well-nourished. However, some cats may have difficulty gaining weight, which can be a cause for concern. After trying out different cat food brands and consulting with my veterinarian, I have compiled this buying guide for the best cat food for gaining weight.

1. Consider the Ingredients

The first thing you need to look for in cat food for weight gain is high-quality ingredients. Look for protein sources like chicken, turkey, or fish as they provide essential amino acids that can help build lean muscle mass in cats. Avoid foods with fillers such as corn or wheat, as they do not provide much nutritional value and can lead to weight gain from excess carbohydrates.

2. Look for High-Calorie Options

To help your cat gain weight, you need to choose a cat food brand that has a high-calorie content. Typically, foods designed for senior or indoor cats have lower calorie content and may not be suitable for weight gain purposes. Look for foods with at least 350-400 calories per cup.

3. Consider Wet Food

Wet food tends to have a higher calorie content than dry food as it contains more moisture and fat. Therefore, if your cat is having trouble gaining weight, consider incorporating wet food into their diet. Additionally, wet food is easier to eat and digest for cats who may have dental issues or are picky eaters.

4. Check the Nutritional Adequacy Statement

The Association of American Feed Control Officials (AAFCO) requires all pet food companies to include a nutritional adequacy statement on their packaging indicating if the food meets the minimum nutritional requirements for cats at different life stages. Look for statements such as “complete and balanced” or “formulated to meet the nutritional levels established by AAFCO.” This ensures that your cat will get all the necessary nutrients to support healthy weight gain.

5. Consult with Your Veterinarian

Before making any changes to your cat’s diet or starting them on a new brand of cat food, it is essential to consult with your veterinarian first. They can recommend specific brands or ingredients based on your cat’s individual needs and health conditions.

6. Gradually Introduce New Food

When switching to a new brand of cat food, it is crucial to do so gradually over 7-10 days by mixing small amounts of the new food with their current one. This will allow their digestive system to adjust without causing any stomach upset.

In conclusion, finding the best cat food for gaining weight requires careful consideration of ingredients, calorie content, and consulting with your veterinarian. Remember that every cat’s needs are different, so what works for one may not work for another. With patience and proper nutrition management, you can help your feline friend reach a healthy weight in no time!

Author Profile

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Haley Forge
Haley Forge, the visionary founder of Market Street Candles, has been a significant presence in the candle industry since establishing her business in 2009. Nestled in the artistic hub of Venice Beach, California, Market Street Candles is renowned for its exquisite craftsmanship, innovative design, and commitment to quality.

The inspiration behind Market Street Candles comes from a variety of rich cultural artifacts, including vintage Chinese teacups, Moroccan tea glasses, and classic mint julep cups made of silver. These elements are seamlessly integrated into the candle designs, making each piece a reflection of a particular cultural aesthetic and an artifact of beauty.

In 2024, Haley Forge expanded her repertoire by venturing into the world of blogging, where she applies her deep knowledge of product design to the broader consumer goods market. Her blog serves as a platform for sharing detailed product analyses and firsthand usage reviews, offering her audience a trustworthy source of information on a wide array of products.

Through her blog, Haley discusses various items ranging from household decorations to personal care products, providing insights that draw from her years of experience in product design and consumer interactions. Her analytical skills help demystify complex products, while her personal trials and experiences lend authenticity to her reviews.