9 Best Cat Weight Gain Supplements in 2024 – Reviews & Top Picks
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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.
A Quick Look at Our 2024 Favorites
Rating | Image | Product | Details | |
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Best Overall | Thomas Labs Mega Cal Supplement |
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Best Value | Vetoquinol Nutri-Cal Gel |
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Premium Choice | Wysong Mother’s Milk Supplement |
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Best for Kittens | PetAg KMR Powder Milk Supplement for Kittens |
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Tomlyn Nutri-Cal Gel High Calorie |
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The 9 Best Cat Weight Gain Supplements
1. Thomas Labs Mega Cal Supplement – Best Overall
Form: | Liquid |
Calorie content: | 9 kcal/tsp |
Primary ingredient: | Sorbitol |
Flavor: | Beef |
- 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
- May be messy
- Must be shaken well to distribute nutrients evenly
2. Vetoquinol Nutri-Cal Gel – Best Value
Form: | Gel |
Calorie content: | 28 kcal/tsp |
Primary ingredient: | Corn syrup |
Flavor: | Malt and molasses |
- 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
- 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
Form: | Powder |
Calorie content: | Unlisted |
Primary ingredient: | Milk protein |
Flavor: | Milk and colostrum |
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.
- 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
- Premium price
- Calorie content is unlisted
4. PetAg KMR Powder Milk Supplement for Kittens – Best for Kittens
Form: | Powder |
Calorie content: | 3 kcal/tsp |
Primary ingredient: | Casein |
Flavor: | Colostrum |
- 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
- Premium price
- May be difficult to mix fully into liquid
5. Tomlyn Nutri-Cal Gel High Calorie Supplement
Form: | Gel |
Calorie content: | 28 kcal/tsp |
Primary ingredient: | Corn syrup |
Flavor: | Malt |
- 28 kcal/tsp
- 30% fat
- Good source of fatty acids and nutrients
- Highly palatable
- Good option for raising blood sugar quickly
- May be difficult to mix into food or liquids
- Sticky consistency is difficult to force feed if needed
6. Under the Weather Ready Cal
Form: | Gel |
Calorie content: | 28 kcal/tsp |
Primary ingredient: | Malt syrup |
Flavor: | Fish and malt |
- 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
- May be difficult to mix into food or liquids
- Sticky consistency is difficult to force feed if needed
- Unpalatable to some cats
7. The Petz Kitchen Holistic Super Food Broth
Form: | Powder |
Calorie content: | 14 kcal/tsp |
Primary ingredient: | USDA dried beef liver |
Flavor: | Beef |
- 40% protein
- Good source of fatty acids and nutrients
- Contains digestive enzymes to support gut health
- May help reduce inflammation and improve cognitive function
- Lower in calories than most weight gain supplements
- Lower in fat than most weight gain supplements
- Premium price
8. Wapiti Labs Strength with Elk Velvet Antler
Form: | Liquid |
Calorie content: | Unlisted |
Primary ingredient: | Elk velvet antler extract |
Flavor: | Herbal |
- Supports muscle tone, strength, and energy
- May support liver and kidney function
- Formulated for cats of all ages
- Highly concentrated
- Calorie content is unlisted
- Fat and protein percentages are unlisted
- Premium price
9. Richard’s Organics Nutrient Paste Cat Supplement
Form: | Paste |
Calorie content: | 26 kcal/tsp |
Primary ingredient: | Soybean oil |
Flavor: | Tuna |
- 26 kcal/tsp
- 85% fat
- Good source of fatty acids and nutrients
- 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
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.
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.
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