The Best Cat Food For Weight Gain (2021 Reviews)

Has your cat gone from being a happy feeder to a fussy diner? Or has your kitty been losing weight despite having a good appetite? Now is the time to serve your whiskered friend, the best cat food for weight gain!

Rapid weight loss can be just as problematic as obesity, but there are many reasons why cats lose weight. Hyperactive felines who expend more calories than they are taking in are sure candidates for weight loss. It could also be due to depression, intestinal parasites, or an underlying medical problem, such as hyperthyroidism and kidney disease.

Don’t let your cat suffer further! You need to make dietary and lifestyle changes to get your feline companion veer towards the chubby side. One fabulous suggestion is to introduce your kitty to the best cat food for weight gain.

Best Cat Food For Weight Gain (Dry Kibble)

Nulo Freestyle Chicken & Cod Recipe – Editor’s Pick

Nulo’s special Chicken and Cod Recipe is the ultimate feline fantasy! Offering 82% of proteins sourced from deboned chicken, chicken meat, turkey meal, and deboned cod, it is the perfect grub for your feline dynamo.

Nulo’s first four ingredients ensure your little carnivore gets the amino acids it needs to build strong, lean muscles and bounce back from a day of adventure. The best part is that Nulo goes beyond grain-free and excludes potatoes, soy, and tapioca. Likewise, its formulation is free of artificial flavors, colors, or preservatives.

So, what else does this cat food offer? Aside from high-quality meats, your whiskered friend will receive a dose of vitamins and minerals, as well as omega-3 and omega-6 fatty acids sourced from the ingredients seen on the picture.

The best part is that you can use this kibble as your cat’s new maintenance food so that you don’t have to transition your kitty to another product once it reaches the desired weight. Whether your cat is an athlete, a senior, or a kitten, it would do well with this kibble.

What’s more, Nulo added their patented BC30 human-grade probiotics into the food to ensure it supports gastrointestinal health. So, hats off to the best cat food for weight gain, Nuro Freestyle Cat & Kitten Chicken and Cod Recipe!

First four ingredients are high-quality meatsCan be expensive
Loaded with antioxidants and essential nutrients
With Nulo’s BC30 human-grade probiotics
Does not contain starches, grains, and artificial ingredients

Merrick Backcountry Raw Infused Pacific Catch Recipe – Runner’s Up

Opening a bag of this kibble may remind you of the salty ocean right off the bat, but its intense aroma will drive your meat-loving cat wild! This cat food starts with deboned salmon as its number one ingredient, followed by a mix of whitefish and trout.

Aside from protein, these medium-fat fish are rich in taurine, which helps promote a healthy metabolism and protect your kitty from brain aging. Salmon and whitefish meals are also included to provide high-dense proteins in a form cats can digest easily.

What sets the Merrick Backcountry Raw Infused Pacific Catch Recipe apart from the others is that it contains real freeze-dried fish pieces. These tasty bits offer nutritional benefits in its purest state. Know that raw food has always been the gold standard of the feline diet.

While I am pretty sure your kitty will go right for the chunks, your fussy eater will nibble the kibbles enthusiastically, as well. Since the kibbles are tiny, even kittens and senior cats can enjoy this food.

If you are skeptical about wheat and corn gluten as a cat food ingredient, then you would be pleased to know that this product does not contain any of that. Nor does it have artificial colors, flavors, or preservatives.

Features salmon as first ingredientCan be expensive
Includes whitefish and trout as secondary proteins
Comes with real bits of freeze-dried fish
No grains, gluten, and artificial ingredients

Solid Gold Indigo Moon With Alaskan Pollock & Egg

This much-loved holistic pet food manufacturer has established a firm foundation of trust with cat owners since the company’s humble beginnings in 1974. As the company name suggests, their products are solid gold and synonymous with top-quality pet foods.

The Indigo Moon Alaskan and Egg Recipe, in particular, is a crowd-pleaser and is sure to satisfy even the fussiest of eaters. It features fresh-caught Alaskan Pollock, which abounds in omega-3 fatty acids. Solid Gold also fortified their kibble with omega-6 fatty acids in the form of salmon oil and ocean fish meal.

These healthy fats promote healthy heart function and boost the immune system, among many others. You will also witness huge improvements in the skin and coat, as well as the energy levels of your pet.

I did much research about the Indigo Moon, and I always encounter pet owners who swear by its effectiveness in aiding digestion and reducing hairball formation. Given the 90 million living probiotics and fiber-rich ingredients, I wasn’t so surprised.

What I like best about this cat food is that it is suitable for all life stages – kittens, adults, and seniors. The Indigo Moon is also one of the highest protein recipes on the market with minimal carbohydrates. Therefore, it is also perfect for cats with diabetic health concerns.

Provides proteins and omega fatty acids sourced from Alaskan Pollock, salmon meal and ocean fish mealLoyal customers are complaining about increasing prices
Packed with probiotics, fiber, antioxidants
Suitable for cats of all life stages
Offers a holistic solution and can be used as maintenance food

Merrick Purrfect Bistro Grain-Free Salmon Recipe

Another dry cat food from Merrick I recommend is their Purrfect Bistro line. As the name suggests, it features real deboned salmon as its number one ingredient. The Purrfect Bistro comes in a wide variety of flavors, but I chose to highlight the Salmon and Sweet Potato Recipe since cats find fish irresistible.

Combined with chicken meal, turkey meal, and chicken fat, this kibble offers 70% protein. Meanwhile, the remaining 30% goes to the fiber-rich produce. It is also packed with essential nutrients and probiotics, but free from all the unpleasant artificial stuff. Also, it does not contain corn, soy, gluten, or unspecified by-product meals.

Moreover, this cat food is rich in omega-3 and omega-6 fatty acids. Many pet owners who have tried this product noticed that their cats develop a softer and silkier coat just a few weeks of transitioning.

Offers 70% protein from chicken meal, turkey meal, and chicken fatMay not be suitable for kitties with sensitive stomachs due to its starch content
Offers 30% essential nutrients, including fiber
Rich in omega-3 and omega-6 fatty acids
Does not contain corn, soy, gluten, or unspecified by-product meals

Purina Tender Selects With Real Salmon – Best For Budget

Next up, we have the Tender Selects with Real Salmon from Purina’s One Purposeful Nutrition line. This is the best cat food for weight gain if you are looking for an inexpensive way to fatten up your kitty without comprising its health.

Although this brand is cheaper than the others, it doesn’t necessarily imply that it is on the bottom rung. Over the years, Purina has graced us with affordable quality pet foods, and the One Purposeful Nutrition is no exception. The manufacturer has boldly claimed that each ingredient in its recipe is added with a purpose. Hence, the name.

Both the salmon and chicken recipes are palatable enough to coax your cat to eat. But since cats go bonkers with fish, I suggest you pick the salmon recipe to ensure your kitty will eat its food with gusto.

The only thing that differs between the two recipes is the main ingredients they use. Both offer natural nutrition fortified with vitamins and minerals. Likewise, each recipe comes in crunchy kibbles with tender meaty bits.

Affordable qualityIt would have been nice if there were more tender bits
Features salmon as no.1 ingredient
Comes in tiny kibbles and grape-sized meaty bits
Irresistible flavor

IAMS Proactive Health Kitten Food

Surprised? Technically, this product is marketed as kitten food, but if you are looking for ways for your adult kitty to put on weight fast, the IAMS Proactive Health Kitten Food can also do the trick.

This kitten food is especially useful for your cat’s current problem because it supplies a good deal of macronutrients and micronutrients. Baby cats require all the nutrition they can get to grow rapidly. Why not use the same strategy for your adult feline?

Its formula supplies 33% protein and 21% fat, which is a perfectly acceptable amount since it is balanced with high protein intake. Besides, upping your cat’s fat intake is all but temporary.

Likewise, digestive issues should be the least of your concern since the formula is tailored to be gentle on the digestive system of kittens. There are no synthetic dyes or artificial preservatives.

Supplies 33% protein and 21% fatMay also cause obesity when given in large amounts for an extended period
Ideal for sensitive tummies
Provides large amounts of essential nutrients
No artificial ingredients added

Best Cat Food For Weight Gain (Wet Canned Food)

Taste Of The Wild Rocky Mountain Salmon & Roasted Venison

Does your cat have the bad luck of not being able to enjoy crunchy kibbles? If your cat is suffering from a dental disease, I suggest you feed your whiskered friend Rocky Mountain Salmon and Roasted Venison by Taste of the Wild.

This canned food features premium-quality roasted meats and highly digestible sources of grain-free carbohydrates. As the name hints, it features fresh salmon as its main ingredient, which supplies a high amount of protein and omega-3 fatty acids, followed by roasted venison. Chicken meat and chicken liver are also added into the mix to give the food more meaty goodness. Instead of plain water, it uses fish and chicken broths to provide it with more flavor.

Many canned options are claiming to be the best cat food for weight gain, but these products aren’t even close to what this food provides. The Rocky Mountain Salmon and Roasted Venison supplies 149 calories for each 5.5-ounce can. This number is among the highest concentration of calories in the canned food genre.

Note that in the first place, wet foods aren’t as calorie-dense as dry kibble. So, this one is quite the game changer!

Supplies 149 calories for each 5.5-oz canCan be expensive
Features salmon as number 1 ingredient, followed by roasted venison
Other proteins include chicken meat and chicken liver
Can be used long-term

Best Cat Food For Weight Gain (Supplements)

DocRoy’s Forti Cal Gel – Best Oral Gel Food Supplement

DocRoy’s Forti Cal Gel is a fantastic product for cats that need an instant calorie boost. Loaded with nutrients, it also benefits cats with compromised health. This calorie-dense treat is particularly helpful to diabetic felines because it stabilizes glucose during an episode of hypoglycemia.

Made with pork liver, fish oil, and molasses, even the pickiest of cats can’t turn down this delicious and nutritious treat! You can administer the supplement straight from the tube or mixed it in with your cat’s meals.

This product garnered tons of positive reviews from pet owners, and that alone is enough to make it outshine other food supplements.

Made with pork liverNone
Offers a wide range of vitamins and minerals
Helps stabilize blood sugar when needed
Easy to administer

Vetoquinol Nutri-Cal Gel

Adding this gel formulation to your cat’s food is a splendid idea to ensure your kitty is getting enough nutrition to stay in tiptop shape. Vetoquinol Nutri-Cal Gel offers a variety of vitamins and minerals, as well as omega-3 and omega-6 fatty acids to nourish skin and promote a luxurious coat.

One teaspoon of this oral supplement supplies 28 calories. The bulk of the calories come from molasses and malt syrup, both of which are calorie-rich ingredients.

While I highly recommend this product to help your kitty regain weight quickly, I wouldn’t encourage it as a long-term add-on to your cat’s diet. Otherwise, your next problem would be solving feline obesity.

Supplies 28 calories per teaspoonNot suitable for long-term application
Fortified with omega-3 and omega-6 fatty acids
Provides fast results
Easy to administer

Miracle Vet High-Calorie Weight Gainer For Pets – Best Liquid Supplement

The Miracle Vet High-Calorie Weight Gainer for Pets offers 150 calories per ounce. Each bottle contains 16 fluid ounces, and so, your kitty gets a whopping 2,600 calories after 16 servings. This fantastic number will surely help an underweight cat pack on the pounds.

Unlike our other picks, this supplement takes the bulk of the calories from fish and canola oils, not from sugar. Both of these oils are healthy, as they offer omega fatty acids and whey protein. Alongside these healthy oils are a range of vitamins and minerals to boost your cat’s immune system and improve overall nutrition.

Best of all, this product is vet-approved and produced in an FDA-registered facility. Conceivably harmful additives or undisclosed proprietary blends are the least of your concerns. While it isn’t the cheapest option, a little goes a long way.

Vet-approved formula that is made in an FDA-registered facilityOne of the most expensive options
Offers 150 calories per ounce
Uses fish and canola oils instead of sugary ingredients
Supplies a range of vitamins and minerals

How To Pick The Best Cat Food For Weight Gain And Muscle Mass

It can be disheartening to see your feline companion waste away. Hence, consult your vet instantly to rule out any possible health concerns. If your cat’s medical problem is handled and parasites are treated with the best dewormer, the next step would be to feed your kitty the best cat food for weight gain.

But what makes the best cat food for weight gain? You don’t correct your cat’s calorie deficit by feeding your pet with junk food. The following should help your cat achieve a healthy weight.

Tickle The Tastebuds

The first and fundamental step is to navigate your cat’s preferences to make sure she eats her food with gusto. Even if the food fits your kitty’s dietary requirements, she will give it a brush off unless he finds it palatable.

It is not unusual for cats to respond to a different protein option and change their tastes as they age. So, switch to a new flavor profile. You may also want to add a meal topper to entice your cat to eat.

Hunt For High-Quality Protein

Protein is the most vital macronutrient that our domesticated felines need to thrive. As you may already know, cats are obligate carnivores since birth. In the wild, their diet consists of mice, rabbits, shrews, lizards, and small snakes. These prey are estimated to supply about 55% protein and 45% fat.

Since our whiskered friends are natural predators that thrive with proteins, how can we ensure their modern diet fits their nutritional needs? Choosing the best cat food for weight gain listed above or any of its runners-up can help big-time.

Back in the days, pet owners were discouraged from feeding their senior cats with a high-protein diet due to a possible connection with chronic kidney disease. Current research, however, shows that old cats are the first group to benefit from a diet rich in high-quality animal protein.

Fortified With Essential Nutrients

The more calories you can get into your underweight cat, the better. However, you don’t want to fatten up your cat without boosting its vitamin and mineral intake.

As vitamins and minerals act in concert and perform hundreds of roles in the body, the lack of it may cause your cat to deteriorate. Omega fatty acids are also vital for promoting certain bodily functions, as well.

Dry Kibble Vs. Canned Food

Dry Kibble is the best cat food for weight gain, especially if you choose a certain recipe that strikes the right balance between high-quality protein and healthy polyunsaturated fats.

But if you have a senior cat that has lost weight due to poor dental health, you might want to consider the kibble size and texture of the food so that you will not exacerbate the problem. Better yet, choose a wet canned food mixed with a teaspoon of food supplement.


Not only do skinny kitties look sad and old, but they also face a high risk of serious health problems. Therefore, help your whiskered friend maintain a healthy weight by feeding it with the best cat food for weight gain.

Any of the foods listed above should help your kitty put on some pounds quickly. At the same time, you can be sure your kitty gains weight at a healthy rate.

The Nulo Freestyle Chicken and Cod Recipe is an excellent example because it provides a high percentage of proteins. Instead of carbohydrates, it offers healthy fats as a worthwhile source of energy.

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Lara Jill Regencia-Baylosis

Lara's love for animals started at the age of 5 when she took care of a little injured chick. She's now the proud fur momma of a mischievous and highly energetic Chow Chow and a supporting patron of The Philippine Animal Welfare Society.

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