The Best Cat Weight Gain Supplements (2022 Reviews)

Skylar Dial
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As cat owners, there are some things we don’t really mind doing – like cleaning the litter box, taking naps, and feeding the cats. Well, most of us don’t mind the last one. We just don’t want to keep dragging out that wet, smelly fish food every day. Luckily, there’s a solution, and it’s called wet cat food pellets.

Yes, there are dry cat food pellets out there, but they’re mostly for older cats and kittens, not for adult cats. For adult cats, wet food pellets are a much better solution. If you’re looking at a way to help your cat gain some weight but concerned about the high fat content of wet food, then you need to learn all about the best cat weight gain supplements.

NameCategoryProduct
Oxbow Animal Health Critical CareBest OverallOxbow Animal Health Critical Care
Marshall Pet Products Uncle Jim's "Original" Duk Soup Mix Ferret Food Supplement & Dietary AidBudget PickMarshall Pet Products Uncle Jim's "Original" Duk Soup Mix Ferret Food Supplement & Dietary Aid
Revival Animal Health Doc Roy's Forti CalUpgrade PickRevival Animal Health Doc Roy's Forti Cal

1. Oxbow Animal Health Critical Care

Our rating: 9 / 10

Oxbow Animal Health Critical Care

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Pros:

  • Comes with the Carnivore formula which is appropriate for cats that haven’t eaten for a while
  • Great for any cat that has problems with digestion or bloating
  • Gentle to your cat’s stomach
  • Works well to build up a cat’s appetite for sick or older cats
  • Helps your cat gain weight if its underweight
  • Doesn’t upset your cat’s tummy
  • Stable for cats with sensitive tummies
  • A balanced diet supplement that’s right for your cat
  • Provides them with the essential nutrition they need to be healthy

Cons:

  • It’s a little costly since it’s a high quality product
  • Some report that it has a smell

The Oxbow Animal Health Critical Care is a high quality food supplement for cats that’s specially formulated to help sick and older cats gain weight.

It’s made from natural ingredients that have been clinically shown to help cats build up their appetite and gain weight, while restoring their natural nourishment.

2. Marshall Pet Products Uncle Jim's "Original" Duk Soup Mix Ferret Food Supplement & Dietary Aid

Our rating: 8 / 10

Marshall Pet Products Uncle Jim's "Original" Duk Soup Mix Ferret Food Supplement & Dietary Aid

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Pros:

  • Very long-lasting
  • Can be used along with other food
  • Improves coat condition
  • No artificial dyes, fillers, grains, or preservatives with added vitamins
  • Affordable
  • Made in the USA
  • 10% off coupon available
  • High protein, low fiber, low fat, and low sodium
  • 100% money back guarantee
  • Easy to use

3. Vetoquinol Nutri-Cal High Calorie Nutritional Oral Gel Supplement

Our rating: 8 / 10

Vetoquinol Nutri-Cal High Calorie Nutritional Oral Gel Supplement

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Pros:

  • Chewable
  • Has a high-calorie formula
  • Promotes healthy weight gain in cats and dogs
  • Good for active cats
  • Made in the USA
  • Veterinary-recommended
  • Nutritional supplement for dogs and cats
  • Will help your kitty fight malnutrition
  • Great for senior dogs
  • Satisfies a cat’s instinctive need to chew

Cons:

  • Nutri-Cal is not an emergency diet and should only be given under the supervision of your veterinarian.

The Nutri-Cal High Calorie Gel Supplement is ideal for: cats desiring a healthy weight gain and increased intake of calories; senior cats that need a high-calorie protein source; lactating queens who require extra calories to produce milk for their kittens. It can also be used for picky eaters and can be mixed with canned food.

This is one the Best Cat Weight Gain Supplements on the market in 2019 because, it contains 150 calories per tube. It’s a great addition to any cat’s diet as it’ll help maintain a healthy weight.

4. Ample Nutrition Digestive Enzyme

Our rating: 8 / 10

Ample Nutrition Digestive Enzyme

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Our team here at ReviewsRUs wanted to find a supplement that would work both for dogs and cats. To our surprise, there are hardly any other supplements like these out there. We also like that this supplement doesn’t contain unnecessary fillers like corn, wheat, and soy. Instead, this digestive enzyme supplement is made from natural ingredients. Also, it’s suitable for both dogs and cats, which is uncommon.

5. Enercal High Calorie Nutritional Supplement Gel

Our rating: 8 / 10

Enercal High Calorie Nutritional Supplement Gel

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The Enercal High Calorie Gel is an excellent weight gain supplement for cats. This food supplement can help to improve the overall condition of your pet, while maintaining the sheen of their coat and skin.

The Enercal High Calorie Gel is rich in nutrients such as vitamins, minerals and amino acids. While having a caloric density of 1500 kcal/kg and 15 pound net weight.

It is suitable for both cats and kittens. It looks like a thick, rubber like gel in a small cup, and it does have a somewhat familiar smell. However, the ingredients are high-quality, and it comes from reputable and proven brands.

6. Instinct Freeze Dried Raw Boost Mixers Grain Free Recipe All Natural Cat Food Toppers

Our rating: 8 / 10

Instinct Freeze Dried Raw Boost Mixers Grain Free Recipe All Natural Cat Food Toppers

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Pros:

  • A complete weight gain package with more than 6 different flavors to choose from
  • Only made with natural, grain-free ingredients
  • Designed to support an active lifestyle
  • Slow-roasted to maintain the flavor, nutrients, vitamins and minerals
  • Suitable for indoor cats as well as outdoor cats
  • Can also be used as a supplement for an already established diet
  • Comes with two packages for medium and large cat breeds
  • Provides an alternate to vet hospitals and high-carb diets
  • No soy and grain diets to damage your cat’s sensitive digestive systems
  • Good peace of mind, knowing your cat is well looked after

Cons:

  • You’ll have to mix them with your cat’s current food
  • There are inconsistent reviews about the taste (it can be grainy)
  • Might cause flatulence in some cats; due to the high protein content

Freeze Dried Works Best for Fussy Eaters, Overweight Cats, Picky Cats, Hairballs, Slimmers, Skin, Digestion, Nutrition, Loss Weight, Healthy Cat, Food topper, Supplements for Cats

7. Miracle Vet High Calorie Weight Gainer

Our rating: 8 / 10

Miracle Vet High Calorie Weight Gainer

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Pros:

  • Available in two varieties
  • Healthy, balanced ingredients
  • Can help pets gain weight and increase muscle mass
  • Reliable and well-known brand

If you’re one of those pet owners who’s concerned about your pet’s weight – or if you simply want to ensure your pet is getting the nutrition it needs – then Miracle Vet High Calorie Weight Gainer is a product to consider. Working well in conjunction with other food sources, this supplement can help you introduce healthy weight gain to your Pitbull.

Anyone who’s owned a pet in the past knows that it’s a lot easier to gain a few pounds as a pet than as a human. As a service animal, a healthy weight gain is particularly important for Pitbull. If you’re not careful, your Pitbull may begin to feel lethargic and out of shape.

As the manufacturer says, this supplement can help you address certain issues, such as:

8. Mark & Chappell Nurish-UM Paste

Our rating: 8 / 10

Mark & Chappell Nurish-UM Paste

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Pros:

  • Good value for money
  • Calms pets in a variety of stressful situations
  • Maintains soft and shiny fur
  • Can be used all year round

Cons:

  • Only works with fresh food and water
  • Tastes bad

Mark & Chappell Nurish-UM Paste for Cats is the best weight gain supplement for cats. This pet paste for gaining weight for cats will give a fast result in a small amount of time.

Unlike other weight gain paste for cat, this one is made from natural products. That’s why it can be used even your cat is allergic to certain ingredients.

Your cat needs to eat at least 40g protein per KG/ week. So you can feed your cat each week about 32g protein.

9. Under the Weather Pets

Our rating: 8 / 10

Under the Weather Pets

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Pros:

  • Includes Omega-3 DHA and Omega-6 Glucosamine
  • Includes
  • Easy to use
  • Compact and inexpensive

Cons:

  • Meat meal as first or second ingredient
  • Need to feed multiple times a day, 1-2 teaspoons each time
  • Not suitable for minors

| For Dogs, Cats, Puppies, Kittens – Aids in Pregnancy & Gravid Support, as well as Degenerative Muscle or Bone Disease (Arthritis), Digestive & Other Disease, or Injury | MADE IN THE USA.

Additional good product suggested by our vet:

Pet Naturals Organic Puppy & Weight Gain is a wholesome, organic food supplement for puppies designed to meet their unique nutritional needs. As puppies grow, they require a higher protein and fat content to promote bone growth and other important developmental processes. Pet Naturals Organic Puppy & Weight Gain is specially formulated for growing puppies to help support healthy weight gain, maintain overall health, and reach full potential as they mature. Our unique blend of organically grown ingredients are used to create a powerful combination of vitamins, minerals, digestive enzymes, and organic prebiotics for both optimal health and proper nutrient absorption.

10. PetAg High Calorie Gel

Our rating: 7 / 10

PetAg High Calorie Gel

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Pros:

  • Great for overweight cats. The recommended amount of daily feeding is 1/4 tsp. per pound of body weight (approximately 0.8 tsp. for every 2 lb. cat). This product is very rich and can be used for overweight cats or cats with diabetes.
  • Pretty great price! You get a lot of product for a small amount of money.
  • It tastes great! Your cat will love it.
  • No chemicals or additives, so it will help you avoid any unnecessary substances that could pose a risk to your cat.
  • Very nutritious. Your cat will be getting a healthy, high-quality ingredient treat.
  • Very easy to use! Just add it to your cat’s wet food. It melts completely and easily mixes into wet food.
  • A great way to avoid your cat becoming overweight. Weight management is very important when it comes to dogs and cats, so if you are not overweight you’ll find that using this product can help you achieve your ideal weight.
  • This case contains 6 pounds of cat food supplement, if you use it daily, it should last you for approximately 2 months.
  • This product is great because it’s really healthy for your cat. It gives him/her everything they need in one handy cat supplement.

11. PetAg Catsure Powder

Our rating: 7 / 10

PetAg Catsure Powder

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This product has a high protein content and is basically like minute steak for your cat. It is a hypoallergenic formula for cats with sensitive stomachs. The formula contains proteins from fish and when it comes to giving this to your kittens, it is very safe and does not cause problems with digestion.

This product is a great option for anybody looking to help their cats gain weight. Since most cats don’t eat enough, this is a good supplement that comes with raw krill as a protein source.

The best time to use this is in the morning to provide your cat with energy later on during the day. Try out this product and you’ll notice the difference in your cat’s body and behavior.

12. Dr. Becker's Appetite Boost

Our rating: 6 / 10

Dr. Becker's Appetite Boost

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This therapeutic appetite stimulant is designed to stimulate appetite in otherwise healthy felines with a low appetite. Around 40% feel there cat’s appetite is improved with Dr. Exotic's Solution for cats. But it’s not designed for feline obesity, cats with kidney or liver disease, or cats that are ailing from chronic illness.

Although it’s a multivitamin and mineral formula, it’s not designed to replace any of the normal cat vitamins that cats are supposed to get from their food. If your one cat is missing a lot of the vitamins it needs to stay healthy, then this supplement really isn’t a good idea. It’s just designed to help cats at their ideal weight put on a little extra weight.

It’s also designed to be used for a short period of time. It’s not something you should use for more than a couple of months.

13. Tomlyn Nutritional Supplement Gel

Our rating: 6 / 10

Tomlyn Nutritional Supplement Gel

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Pros:

  • Available in different brands and flavors
  • Convenient packaging makes it easy to administer
  • Easy instructions to follow for herding cats
  • Contains vitamins and nutrients cats need for a balanced diet
  • Comes at an affordable price compared to other products in the market
  • Does not have a fishy smell

Cons:

  • Available only in gel form
  • Available only in small sizes
  • Needs to be refrigerated after opening
  • Only available online

A cat weight gain supplement is designed to help cats gain weight when they’re underweight. Weighing less than the normal 4-6 lbs. is a sign that your cat needs to gain weight.

Cats eat to keep their body temperature constant at 101° to 102°F. And this needs to be kept in mind only after weighing a kitten or a cat. Weighing less than 4 pounds can be due to a variety of factors like a medical problem, a diet lacking in calories, thyroid problems, among others.

Your veterinarian can help you determine the cause for the weight loss, and accordingly give you weight gain supplements for cats.

14. Hartz Lickable Wet Cat Treats

Our rating: 6 / 10

Hartz Lickable Wet Cat Treats

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If you’ve adopted a recently rescued kitty then chances are they’re underweight. However, providing them with the proper diet can be taxing – your furry friend hates feeding time.

These Hartz Lickables Cat Supplements are a tasty solution to this issue – just store them on your countertop and your cat will eat them in no time.

Each packet contains four tubes, which will cover four feedings. Additionally, they’re fortified with vitamins and minerals to prevent deficiencies that might result in digestive problems.

15. TOMLYN Nutri-Cal High Calorie-Nutritional Gel

Our rating: 6 / 10

TOMLYN Nutri-Cal High Calorie-Nutritional Gel

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Pros:

  • Extensively researched
  • Contains a diverse blend of vitamins and minerals
  • Precisely measured for the health of cats and kittens
  • Contains no synthetic preservatives
  • Contains no artificial coloring
  • Portable and easy to add to your pet’s food
  • Comes in both 16 and 4.25 oz packaging

Cons:

  • Weighs about an ounce
  • Doesn’t contain a large amount of proteins
  • Not for cats that have constant diarrhea
  • High-calorie supplement may be too rich for our senior cats

For the cat owners out there with a picky eater, TOMLYN Nutri-Cal High Calorie-Nutritional Gel for Cats & Kittens will be the perfect fit for your feline companion.

TOMLYN Nutri-Cal High Calorie-Nutritional Gel for Cats and Kittens honestly provides nutritional support and helps reduce disease.

16. Revival Animal Health Doc Roy's Forti Cal

Our rating: 6 / 10

Revival Animal Health Doc Roy's Forti Cal

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Pros:

  • High calorie energy source to boost your cat’s appetite and help him put on weight
  • Delicious flavor (roast beef and liver) that appeals to your pet
  • Contains lipase and protease, which aids in the digestion of fats and proteins
  • Available in 4.25 oz pouch, making it easier to carry around
  • Made in the USA

Cons:

  • Expensive
  • The manufacturing company is relatively unknown

With so many weight gain supplements out there, it’s hard to know which to choose, but Revival Health's Doc Roy's Forti Cal could just be the one for you. High in calories and with a delicious flavor, this bottle of liquid could be exactly what your cat needs. As with all of the other factors, you should know a little about the company before buying their product.

The company, Revival Health, is a fairly new company, having been established in 2008. The company appears to be dedicated to quality pet supplements and pet healthcare products. They manufacture most of their products in the USA.

17. GNC Pets Ultra Mega High Calorie Booster Gel

Our rating: 5 / 10

GNC Pets Ultra Mega High Calorie Booster Gel

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Pros:

  • It’s one of the few vitamin and mineral supplements that actually have a matching flavor
  • It has 25g of protein per serving
  • It’s very nutritious
  • Contains vitamins
  • The calorically dense gel is great for recovering after strenuous exercise sessions
  • The quantity per container is impressive
  • It’s made in the USA
  • It’s reasonably priced
  • The delivery is surprisingly quick

Cons:

  • It’s a lot more expensive than other brands
  • The flavor isn’t very appealing
  • Meat-based proteins are better absorbed by cats than plant-based proteins

For Weight Gain | 15.2 oz

18. NaturVet – Cat-Cal Nutritional Gel

Our rating: 5 / 10

NaturVet – Cat-Cal Nutritional Gel

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Pros:

  • A great supplement for low energy cats with weight loss problems
  • Cat-Cal is made from natural ingredients, and doesn’t contain any by-products or artificial colors
  • Mixed reviews

Cons:

  • Achieves best results when you combine this gel with healthy, calorie-dense food
  • May cause bad breath and constipation

NaturVet Cat’s Weight Gain Plus is an effective, palatable gel for cats that will help them regain weight. It’s rich in high-energy calories, highly digestible protein, omega 6 and omega 3 fatty acids, and is made with low oxalic acid formula.

To get optimal results, you can combine Cat-Cal with your pet’s regular diet to increase the fat content while adding calories. It’s available in a 5-ounce jar.

19. Rachael Ray Nutrish Purrfect Broths Wet Cat Food Complement

Our rating: 5 / 10

Rachael Ray Nutrish Purrfect Broths Wet Cat Food Complement

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Pros:

  • Made with only the freshest ingredients
  • A natural alternative to canned food
  • Moist, wholesome
  • Great for fussy or picky cats
  • Provides the nutrient balance cats need
  • Easy to handle
  • Great for both the cats and the employees at the shelter
  • 2lb = 64 servings

Cons:

  • Needs to be refrigerated
  • It’s not cheap
  • Might get smashed down
  • It’s only available at Walmart and Amazon

Natural Chicken.

20. Abbott Laboratories CliniCare Canine/Feline Nutritionally Liquid Diet

Our rating: 5 / 10

Abbott Laboratories CliniCare Canine/Feline Nutritionally Liquid Diet

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Pros:

  • A fully balanced feed given in just one daily feeding
  • Provides just the right amount of nutrients in each meal
  • Comes as a highly palatable, highly caloric, soft food
  • Less mess and no fuss
  • Easy to feed
  • Completely balanced formula
  • No artificial colors, flavors, or preservatives
  • Can be fed even to severely malnourished animals
  • FDA-approved
  • Made in the USA

Cons:

  • Pricey
  • Not for long-term use
  • The liquid form can be messy, so it’s preferable to use a syringe
  • Can be too rich for cats with kidney disease

21. Thomas Labs Mega Cal

Our rating: 4 / 10

Thomas Labs Mega Cal

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Pros:

  • Has high calorie content
  • Available in several flavours, including sweet treats
  • Available in both dry and wet forms
  • Keeps pets from getting malnourished

Cons:

  • Prolonged use can lead to obesity in pets
  • Affects the kidneys and stomach

Once animals have been diagnosed with kidney problems, they generally become malnourished because their organs aren’t working properly.

The Thomas Labs Mega Cal is a nutritional supplement designed to put the weight back on these pets and help them feel better.

It’s designed to sustain energy levels, boost stamina and rouse appetites. Available in both dry and wet form, it’s available in a variety of flavours too, including chicken, beef and biscuits & gravy.

22. TNT interactive Virbac Nutri-Plus Gel Nutritional High Calorie Energy Supplement

Our rating: 3 / 10

TNT interactive Virbac Nutri-Plus Gel Nutritional High Calorie Energy Supplement

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► Rated 4.3 out of 5.0

A feline supplement that packs a powerful nutritional punch. Nutri-plus Gel contains ingredients like hydrolysed animal proteins, hydrolysed fish and hydrolysed chicken.

This product is a convenience to owners who struggle to feed their cats on a daily basis and who prefer to feed natural treats.

23. PetAg Vitamin & Mineral Supplement Gel

Our rating: 1 / 10

PetAg Vitamin & Mineral Supplement Gel

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(Packaging May Vary)

PetAg is an industry leader when it comes to veterinary nutrition products for cats and dogs.

This weight gain supplement is ideal for overweight or underweight cats.

Frequently Asked Questions (FAQ)

What can I give my cat to help her gain weight?

When it comes to dieting, cats are notoriously tricky to help gain weight. When it comes to dieting, cats are notoriously tricky to help gain weight.

Being a carnivore, your cat won't eat more to receive more calories. In fact, your cat will eventually start to reject food if it's too high in calories. Which means that, on its own, your cat won't gain weight.

Third-party weight gain supplements are available in the form of treats, and a few even come in the form of foods that look like small chunks of meat. These supplements can help your cat in many ways:

  • By giving it the nutrients it needs to stay sated;
  • By providing additional calories;

By giving it a taste of something it loves while also delivering the vitamins and minerals it needs.

Which is the best supplement for weight gain?

First of all, don’t worry too much about the supplement part here.

Instead of spending money on an overpriced supplement, try focusing on what your cat already loves to eat.

My best recommendation to new owners, especially those with small cats, is to start out feeding your cat a high-quality dry food.

I find the dry food is the best way to prevent obesity while also tiding cat owners over until they can mix the wet into their cat’s diet.

For most cats, I recommend feeding a high-quality, easily digestible, high protein dry food.

Once your cat is used to eating dry food, when you want to introduce a wet food, just mix some wet food with his usual portion.

I find it best to give cats wet food along with the dry to secure nutritional needs.

What causes a cat to gain weight quickly?

Obesity is defined as the excessive storage of fat, with the most common body sites being the abdomen or tail.

Cats are notorious for loving their food. Behavior changes associated with excessive food consumption are termed as overfeeding syndrome. These include a lack of physical activity, a lack of interest in these types of activities, and sometimes even feline diabetes mellitus.

The causes of excessive food intake can be many, with the most common being a cat’s own hunger. Owners that pay insufficient attention to their cat’s daily feeding routine can be the cause of this kind of overfeeding.

Overeating can also be a result of the cat’s desire for excessive food. Food driven animals can often result in obesity in cats and other pets.

Delayed gastric emptying or intestinal inertia is a frequent condition in cats that can cause cat obesity.

Can taking supplements make you gain weight?

It can do; any extra calories are going to be, well, extra calories. Many products on this list are marketed (and work) with this in mind: they don’t contain a lot of calories and may include a small amount of extra protein. You’ll find that most of the products on this list are meant to help cats maintain their bodies, rather than putting weight on.

That said, if you’ve noticed your animal eating less because of an illness or other cause, and they’re starting to look scrawny, you could consider a weight gain supplement. First, see a vet to make sure there’s nothing physically wrong. Then, take the recommended serving size for a supplement you’re interested in and give your cat that amount of food with the supplement added.

Conclusion

If you own a Cat, or if you have been tasked with raising one of those furry creatures, and if it’s not gaining weight, or is losing weight, this article will help you out.

When it comes to raising a cat, there is little doubt that it will be done well if you can raise it with love, but you must also not forget the role that your diet plays in helping your furry friend put on weight and that it is possible to make special cat food that can be prepared to provide the nutrition your Cat deserves. This is why our recommendation for the best food for your cat at the moment is Orijen 18 Fish Digestion and Allergy Control.

Our Recommendation

NameCategoryProduct
Oxbow Animal Health Critical CareBest OverallOxbow Animal Health Critical Care
Marshall Pet Products Uncle Jim's "Original" Duk Soup Mix Ferret Food Supplement & Dietary AidBudget PickMarshall Pet Products Uncle Jim's "Original" Duk Soup Mix Ferret Food Supplement & Dietary Aid
Revival Animal Health Doc Roy's Forti CalUpgrade PickRevival Animal Health Doc Roy's Forti Cal