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10 Best Cat Weight Gain Supplements in 2021 – Reviews & Top Picks

kitten taking weight gain supplement Cats are generally exceptionally hardy animals, but even the strongest cats need a little extra support sometimes. Whether your cat is an orphaned kitten or an adult recovering from an illness or prepping for breeding or show, weight gain supplementation can help get your cat where it needs to be. We’ve put together reviews of the best of the best supplements to help your cat gain weight and reach a healthier place overall. Keep in mind that if you have any concerns about your cat’s weight or health status, you should always check with your veterinarian to make sure any supplements you choose are appropriate for your cat. hepper single cat paw divider

A Quick Comparison of Our Favorites

Rating Image Product Details
Best Overall
Winner
Thomas Labs Mega Cal High Calorie Liquid Cat & Dog Supplement Thomas Labs Mega Cal High Calorie Liquid Cat & Dog Supplement
  • Supports overall health
  • Can be mixed into most foods and liquids
  • Great for convalescing, pregnant, lactating, and show cats
  • Best Value
    Second place
    Vetoquinol Nutri-Cal Gel High Calorie Supplement for Cats & Dogs Vetoquinol Nutri-Cal Gel High Calorie Supplement for Cats & Dogs
  • Good source of fatty acids and nutrients
  • Good option for raising blood sugar quickly
  • Malt and molasses flavor is palatable to most cats
  • Premium Choice
    Third place
    Wysong Mother’s Milk Supplement Wysong Mother’s Milk Supplement
  • Milk protein is the first ingredient
  • Rich in antibodies, proteins and fats
  • Palatable flavor replicates breast milk for animals
  • Best for Kittens
    PetAg KMR Powder Milk Supplement for Kittens PetAg KMR Powder Milk Supplement for Kittens
  • 42% protein and 25% fat
  • Supports digestive health
  • Can be fed as food topper to adult cats
  • Tomlyn Nutri-Cal Gel High Calorie Supplement for Cats Tomlyn Nutri-Cal Gel High Calorie Supplement for Cats
  • Highly palatable
  • Good source of fatty acids and nutrients
  • Good option for raising blood sugar quickly
  • The 10 Best Cat Weight Gain Supplements – Reviews & Top Picks 2021

    1. Thomas Labs Mega Cal High Calorie Liquid Cat & Dog Supplement – Best Overall

    Thomas Labs Mega Cal High Calorie Liquid Cat & Dog Supplement

    Form: Liquid
    Calorie content: 9 kcal/tsp
    Primary ingredient: Sorbitol
    Flavor: Beef
    The best overall cat weight gain supplement is the Thomas Labs Mega Cal High Calorie Liquid Cat & Dog Supplement, which contains 27.9 kcal/tsp with 0.18% protein and 38.23% fat. It has essential vitamins, minerals, and amino acids to support your cat’s overall health. It’s beef flavored for maximum palatability and since it’s a liquid, you can mix it into a variety of foods and liquids if your kitty won’t eat it on its own. It’s great for providing nutritional support to underweight, pregnant, lactating, and show cats. It’s intended to be fed in conjunction with a healthy, balanced diet. Since this is a liquid, it can get messy and may be prone to spilling. It also needs to be shaken well before use to ensure the nutrients are evenly distributed.
    Pros
    • 9 kcal/tsp
    • 23% fat
    • Essential nutrients to support overall health
    • Palatable beef flavor
    • Liquid can be mixed into most foods and liquids
    • Great for convalescing, pregnant, lactating, and show cats
    Cons
    • May be messy
    • Must be shaken well to distribute nutrients evenly

    2. Vetoquinol Nutri-Cal Gel High Calorie Supplement for Cats & Dogs – Best Value

    Vetoquinol Nutri-Cal Gel High Calorie Supplement for Cats & Dogs

    Form: Gel
    Calorie content: 28 kcal/tsp
    Primary ingredient: Corn syrup
    Flavor: Malt and molasses
    The best cat weight gain supplement for the money is the Vetoquinol Nutri-Cal Gel High Calorie Supplement for Cats & Dogs. This gel supplement has 28 kcal/tsp, 0.2% protein, and 30% fat. It’s a good source of omega-3 and omega-6 fatty acids, as well as other nutrients. This supplement is malt and molasses flavored, making it highly palatable for even the pickiest cats. It’s a good option for cats with low blood sugar or those recovering from injury or illness. This gel consistency is quite sticky and thick, which can make it difficult to manage. It’s also difficult to force feed to cats that are refusing to eat it.
    Pros
    • 28 kcal/tsp
    • 30% fat
    • Good source of fatty acids and nutrients
    • Malt and molasses flavor is palatable to most cats
    • Good option for raising blood sugar quickly
    • Best value
    Cons
    • May be difficult to mix into food or liquids
    • Sticky consistency is difficult to force feed if needed

    3. Wysong Mother’s Milk Supplement – Premium Choice

    Wysong Mother’s Milk Supplement

    Form: Powder
    Calorie content: Unlisted
    Primary ingredient: Milk protein
    Flavor: Milk and colostrum
    The premium pick for supplements to help cats gain weight is the Wysong Mother’s Milk Supplement. This powdered supplement is made to replace breast milk for kittens and puppies, so it is rich in all the nutrients that nursing babies need, like antibodies, proteins, and fats. It consists of 49% protein and 17% fat to support growth and weight gain. Milk protein is the first ingredient, and the taste is made to replicate that of milk for kitties. Although formulated for babies, this supplement is a great option for sick and elderly cats that may need a little extra nutritional support. The calorie content for this food is unlisted, which can make it difficult to track how many calories your cat is getting in a day. This can be fed as a powder sprinkled onto food for adult cats.
    Pros
    • Made with the nutrient needs of kittens and puppies in mind
    • Rich in antibodies, proteins, fats, and other nutrients
    • 49% protein and 17% fat
    • Milk protein is the first ingredient
    • Palatable flavor replicates breast milk for animals
    • Can be fed as a food topper powder to adult cats
    Cons
    • Premium price
    • Calorie content is unlisted

    4. PetAg KMR Powder Milk Supplement for Kittens – Best for Kittens

    PetAg KMR Powder Milk Supplement for Kittens

    Form: Powder
    Calorie content: 3 kcal/tsp
    Primary ingredient: Casein
    Flavor: Colostrum
    PetAg KMR Powder Milk Supplement for Kittens is one of the top milk replacers on the market for kittens. The first ingredient is casein, which is a protein found in mammalian breast milk. This supplement is made with 33.3 kcal/tsp, 42% protein, and 25% fat, as well with live beneficial bacteria to support gut health. It’s available in four package sizes from 6 ounces to 5 pounds, making it a good option no matter how many cats or kittens you’re feeding. It can be used in its powder form to top dress food for show, convalescing, sick, and recovering cats. Some people who have used this product have had difficulty getting it to fully mix into liquid, so getting the powder lumps mixed out may be difficult.
    Pros
    • Best option for kittens
    • 3 kcal/tsp
    • 42% protein and 25% fat
    • Includes beneficial bacteria to support digestive health
    • Four package sizes available
    • Can be fed as food topper to adult cats
    Cons
    • Premium price
    • May be difficult to mix fully into liquid

    5. Tomlyn Nutri-Cal Gel High Calorie Supplement for Cats

    Tomlyn Nutri-Cal Gel High Calorie Supplement for Cats

    Form: Gel
    Calorie content: 28 kcal/tsp
    Primary ingredient: Corn syrup
    Flavor: Malt
    The Tomlyn Nutri-Cal Gel High Calorie Supplement for cats is a malt flavored gel supplement with 28 kcal/tsp. It also 0.2% protein and 30% fat. It’s rich in omega-3, omega-6, and omega-9 fatty acids, as well as other vital nutrients. Although it’s made to be highly palatable, it is thick and sticky, making it difficult to mix into foods or force feed if needed. This supplement can help quickly improve low blood sugar and uses corn syrup as its first ingredient. By improving blood sugar levels, this supplement also helps increase the appetite, helping your cat get back to maximum health.
    Pros
    • 28 kcal/tsp
    • 30% fat
    • Good source of fatty acids and nutrients
    • Highly palatable
    • Good option for raising blood sugar quickly
    Cons
    • May be difficult to mix into food or liquids
    • Sticky consistency is difficult to force feed if needed

    6. Thomas Labs Goatalac Goat Milk Replacer Powder Puppy & Kitten Supplement

    Thomas Labs Goatalac Goat Milk Replacer Powder Puppy & Kitten Supplement

    Form: Powder
    Calorie content: 27 kcal/tsp
    Primary ingredient: Dried goat milk
    Flavor: Goat’s milk
    The Thomas Labs Goatalac Goat Milk Replacer Powder Puppy & Kitten Supplement is a goat’s milk-based powder supplement intended to replace breast milk for nursing kittens and puppies. It has 27 kcal/tsp, 24% protein, and 24% fat. Dried goat milk is the first ingredient, and this supplement is available in two package sizes. It contains digestive enzymes and probiotics to support gut health. and it supports growth and weight gain. It can be offered to adult cats to help support maximum health and weight gain. Since goat’s milk is the primary ingredient in this product, it may be difficult for some cats to properly digest. Ideally, it should be reconstituted before offering it to adult cats, and it may be difficult to get all of the powder clumps out.
    Pros
    • 27 kcal/tsp
    • 24% protein and 24% fat
    • Two package sizes available
    • Supports gut health with probiotics and enzymes
    • Supports growth and weight gain
    Cons
    • May be difficult for some cats to digest
    • May be difficult to mix fully into liquid

    7. Under the Weather Ready Cal High Calorie Food Nutritional Gel Cat Supplement

    Under the Weather Ready Cal High Calorie Food Nutritional Gel Cat Supplement

    Form: Gel
    Calorie content: 28 kcal/tsp
    Primary ingredient: Malt syrup
    Flavor: Fish and malt
    The Under the Weather Ready Cal High Calorie Food Nutritional Gel Cat Supplement has 28 kcal/tsp, 0.6% protein, and 18.5% fat. It comes in an easy-dose syringe and is a good option to rapidly raise blood sugar levels and improve appetite. It contains nine vitamins, seven minerals, and omega fatty acids in a malt and fish-flavored gel. The dial-a-dose syringe guarantees accurate dosing, ensuring your kitty gets the right amount of product to support weight gain. It’s thick and sticky, making it difficult to force feed and mix into foods and liquids. This supplement is made to be highly palatable, but some cats don’t care for the flavor and may refuse to eat it.
    Pros
    • 28 kcal/tsp
    • 5% fat
    • Good option for raising blood sugar quickly
    • Good source of fatty acids and nutrients
    • Dial-a-dose syringe makes for easy dosing
    Cons
    • May be difficult to mix into food or liquids
    • Sticky consistency is difficult to force feed if needed
    • Unpalatable to some cats

    8. The Petz Kitchen Holistic Super Food Broth One & Done Daily Greens Support Beef Flavor Concentrate Powder

    The Petz Kitchen Holistic Super Food Broth One & Done Daily Greens Support Beef Flavor Concentrate Powder

    Form: Powder
    Calorie content: 14 kcal/tsp
    Primary ingredient: USDA dried beef liver
    Flavor: Beef
    The Petz Kitchen Holistic Super Food Broth One & Done Daily Greens Support Beef Flavor Concentrate Powder is a nice option for ensuring your cat gets all the nutrients necessary to support healthy weight gain, growth, and development. It has 14 kcal/tsp, making it lower in calories than most other options, but it does contain 40% protein and 11% fat. It contains omega fatty acids, digestive enzymes, superfoods, antioxidants, vitamins, and minerals. This supplement may help improve appetite and digestive health, as well as reduce inflammation, improve cognitive function, and support the immune system. This product comes at a premium price.
    Pros
    • 40% protein
    • Good source of fatty acids and nutrients
    • Contains digestive enzymes to support gut health
    • May help reduce inflammation and improve cognitive function
    Cons
    • Lower in calories than most weight gain supplements
    • Lower in fat than most weight gain supplements
    • Premium price

    9. Wapiti Labs Strength with Elk Velvet Antler

    Wapiti Labs Strength with Elk Velvet Antler

    Form: Liquid
    Calorie content: Unlisted
    Primary ingredient: Elk velvet antler extract
    Flavor: Herbal
    The Wapiti Labs Strength with Elk Velvet Antler is a unique supplement that features a proprietary blend of elk velvet antler and herbs. This product supports muscle tone, strength, energy, and overall vitality with a combination of traditional herbs. It may also help support normal function of the kidneys and liver. It’s formulated to support cats from kitten to senior. This formula is highly concentrated, so a little goes a long way, making it easier to hide in food if needed. The nutritional information for this supplement is unlisted, so it’s not a good option for counting calories or keeping track of fat and protein intake. It’s a premium priced product, even with its concentrated formulation.
    Pros
    • Supports muscle tone, strength, and energy
    • May support liver and kidney function
    • Formulated for cats of all ages
    • Highly concentrated
    Cons
    • Calorie content is unlisted
    • Fat and protein percentages are unlisted
    • Premium price

    10. Richard’s Organics Nutrient Paste Cat Supplement

    Richard’s Organics Nutrient Paste Cat Supplement

    Form: Paste
    Calorie content: 26 kcal/tsp
    Primary ingredient: Soybean oil
    Flavor: Tuna
    The Richard’s Organics Nutrient Paste Cat Supplement is a tuna-flavored paste that has 26 kcal/tsp, 4.44% protein, and 33.85% fat. It contains omega-3 and omega-6 fatty acids, as well as vitamins and antioxidants. It’s fortified with taurine to ensure your cat is receiving all necessary nutrients. This paste is very thick and may be difficult to squeeze out of the tube. It can also be difficult to mix into food or liquid. It has a strong smell that may be unappetizing to more finicky cats. This supplement comes at a premium price.
    Pros
    • 26 kcal/tsp
    • 85% fat
    • Good source of fatty acids and nutrients
    Cons
    • Thick and difficult to squeeze out of the tube
    • May be difficult to mix into food or liquids
    • Strong smell may be unappealing to some cats
    • Premium price
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    Buyer’s Guide

    Why Does My Cat Need a Weight Gain Supplement?

    Not all cats need a weight gain supplement, even underweight cat. These supplements are typically formulated with sick or injured cats in mind, like kittens with failure to thrive, underweight strays, and cats recovering from major surgery. Weight gain supplements are also sometimes given to show cats to support a healthy coat, weight, and overall appearance. Pregnant and lactating queens can benefit from weight gain supplements because they provide a quick, easy source of calories and energy that may not be being met with diet alone. It’s important to remember that these are supplements and are not intended to replace food, but to supplement it. The exception to this is kitten formulas, which are formulated to replace breast milk. However, they should still be used in conjunction with food in kittens that are old enough to begin weaning. Before starting any supplementation, a vet should be consulted. This is especially important if your cat is ill or injured and needs extra support for recovery.

    Related Read: 10 Best Cat Foods for Weight Losshepper cat paw divider

    Conclusion

    These reviews cover the best supplements on the market to help your cat gain weight or improve its health status. The best overall option is the Thomas Labs Mega Cal High Calorie Liquid Cat & Dog Supplement, which is high in nutrients, easy to dose, and easy to mix into food and liquids. The best option for kittens is the PetAg KMR Powder Milk Supplement for Kittens, which supports the nutritional needs of kittens from birth onward. For tight budgets, the top pick is the Vetoquinol Nutri-Cal Gel High Calorie Supplement for Cats & Dogs.


    Featured Image Credit: Chewy

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