Top 5 Cat Foods for Healthy Weight Gain Reviewed

Does your beloved cat seem too skinny? You feed them regularly, but they just do not seem to pack on the pounds. Watching a thin cat can worry any loving owner. You want your feline friend to be healthy and have a shiny coat, but reaching that ideal weight feels like a constant battle.

Choosing the right food to help your cat gain weight can feel overwhelming. Should you pick high-calorie wet food or special dry kibble? The labels are confusing, and you worry about giving them the wrong nutrients. Many owners face this struggle, unsure which products truly deliver the necessary boost without causing tummy troubles.

This post cuts through the confusion. We will explore the best types of food specifically designed for healthy weight gain in cats. You will learn what ingredients matter most and how to read labels like a pro. By the end, you will feel confident choosing a diet that helps your cat thrive and look their best.

Top Cat Food To Help Cat Gain Weight Recommendations

Bestseller No. 1

High Calorie Nutrition Paste for Cats – 12g x 30 Bars- Provides Weight gain and Appetite Support for picky or underweight Cats - Contains Taurine, DHA Colostrum - Promotes Vitality and Healthy Growth

This high-calorie cat weight support formula is designed as a natural cat appetite stimulant, providing nutrient-dense energy similar to high calorie cat food. It helps underweight cats maintain healthy body condition, making it an ideal cat weight gainer option for kittens, adults, and seniors.
Formulated with premium taurine for cats, this supplement supports feline vitality, energy levels, and daily wellness. As a safe taurine supplement for cats, it promotes heart, vision, and metabolic balance, helping cats stay active while benefiting weight and appetite support.
Enhanced with lysine for cats and DL-Methionine, this blend supports muscle wellness, immune balance, and healthy body condition. These essential amino acids complement cat immune support supplement needs while reinforcing appetite, digestion, and weight maintenance.
Our advanced collagen for cats blend helps maintain muscle integrity, joint comfort, and digestive wellness. This functional cat collagen supports nutrient absorption and works alongside taurine, lysine, and DL-methionine to enhance appetite, vitality, and healthy feline weight gain.
This multi-functional formula works as a gentle cat appetite stimulant and cat weight gainer supplement for kittens, adult cats, and seniors. The combination of high calorie cat food–style nutrition, taurine for cats, lysine for cats, collagen, and DL-methionine supports immune health, muscle strength, and digestive balance.

Bestseller No. 2

Miracle Vet High-Calorie Weight Gainer for Dogs & Cats - Multivitamin Nutritional Supplement Gel, Omega Fish Oil, Calcium - Puppy, Senior, Prenatal Cat & Dog Vitamins, Supplements for Weight Gain

HIGH-CALORIE WEIGHT GAINER for DOGS and CATS - Miracle Vet dog high-calorie weight gain multivitamin supplement is packed with calories and essential vitamins, and minerals to support overall pet health and formulated especially for multiple purposes, including senior dog supplements, dog prenatal vitamins, and dog electrolytes
29 VITAMINS & MINERALS - This cat and dog multivitamin is packed with 29 essential vitamins and minerals, including calcium for dogs and fish oil for cats, designed to support your pet's overall health and well-being. Ideal as senior dog vitamins, and dog food supplements, this versatile formula also works as a dog muscle builder and dog food topper for picky eaters ensuring your furry friend gets all the nutrients they need to thrive
#1 INGREDIENT IS OMEGA-3 FISH OIL - Miracle Vet Weight Gain supplement comes packed with omega-3 fish oil, which promotes healthy skin and coat while providing a natural energy source. Ideal for cat, dog moms and pet care enthusiasts, this dog and cat supplement support the overall health of your furry family members. Additional fish oil health benefits: protects the heart, provides support for dry, flaky skin in allergy, helps slow down the progression of kidney disease, aids arthritic joints
EASY TO USE NUTRITIONAL SUPPLEMENT - Our weight gainer for dog and cat multivitamin is simple to incorporate into your pet's daily routine, whether mixed with their regular dog food, used as a dog food topper for picky eaters, or added to water. Ideal for small breed dogs, senior dogs, and puppies, this dog and cat nutritional supplement is perfect for pet owners looking to improve their pet's health, muscle growth, and weight gain. Give your furry friend the care they deserve with Miracle Vet
APPETITE STIMULANT for PETS - Supportive appetite stimulant for dogs and cats will entice even the most finicky eaters, ensuring they get the vitamins and nutrients they need to thrive, including dog electrolytes and calcium for dogs and cats. It caters to various pet needs, making it ideal for cat and dog care. From weight gain and appetite stimulation to senior dog care and prenatal support, this all-in-one formula is perfect for pet parents who want the best for their furry companions

Bestseller No. 3

Solid Gold NutrientBoost™ Cat Food Toppers for Cats - High Protein Meal Topper & Crunchy Cat Treats for Indoor Cats w/Vitamins, Minerals & Amino Acids for Gut Health & Immune Support - All Ages - 1lb

High Protein Cat Food Topper – Solid Gold NutrientBoost Cat Meal Topper is a protein-packed cat food additive powered by plasma to support digestive health, gut function & immunity. Use as a dry cat treat or mix with wet food or dry kibble
Powered by Plasma for Gut Health – With amino acids & protein, the plasma in this Nutrientboost meal topper for cats helps support digestion, nutrient absorption & overall wellness. Great cat snacks for cats with sensitive stomachs or picky eaters
Supports Daily Energy & Whole-Body Wellness – With high-quality animal protein & essential nutrients, these healthy cat treats help fuel your cat’s daily energy levels, support lean muscles & promote a healthy, active lifestyle in kittens & cats
Holistic, Simple Ingredients – No fillers, no artificial flavors—just holistic ingredients. This grain-free cat topper & kitten treats are made for indoor & outdoor cats, kittens & cats with allergies or sensitive stomachs. Perfect for cat enrichment
Versatile Meal Topper or Treat – Sprinkle over dry food, mix into wet meals, or serve on its own as a crunchy cat treat. This cat snacks treats healthy option adds mealtime variety & delivers tasty, functional benefits to support your cat’s routine

Bestseller No. 4

Under the Weather Pet Electrolytes Ready Cal Plus Gel for Cats | Vet-Formulated High-Calorie Supplement for Cats & Kittens | Promotes Weight Gain & Boosts Energy for Sick Felines | 3.5 Oz Tube Pack

HIGH-CALORIE SUPPLEMENT GEL WITH ELECTROLYTES: Give your feline companion a nutritious, high-calorie treat to support their daily needs. This ready-to-use gel is packed with essential nutrients and healthy ingredients to help cats and kittens struggling with their appetite gain weight. Specially formulated to enhance appetite and boost energy levels, it’s safe for cats of all ages and the perfect solution for promoting overall well-being. Shelf life: 24 months from manufacturing date. EXP date printed on top of the cap as EXP MM/YY.
VET FORMULATED AND APPROVED: This tasty salmon-flavored ready-cal gel oral supplement was carefully formulated by veterinarians, ensuring wellness for cats and kittens of all ages. This high-calorie supplement is enriched with a perfect blend of essential vitamins, minerals, electrolytes, Omega-3 and Omega-6 essential fatty acids, which are vital for promoting optimal brain function, maintaining a healthy heart, and shiny coat.
IDEAL FOR FINICKY CATS AND KITTENS: This easy-to-feed high-calorie oral gel is specially designed to provide essential nutrition for growing kittens, young cats, recovering pets after surgery or injury, senior cats, and even picky eaters. A must-have nutritional cat supplement for supporting the overall health and vitality of your beloved feline companions.
EASY-TO-USE SQUEEZABLE TUBE: This tasty oral gel supplement comes in a convenient 100cc squeezable tube. To encourage even the pickiest of pets, simply apply a small amount to their lip or paw. They'll naturally lick it off, enjoying the appealing flavor, making the process both simple and enjoyable for you and your furry friend.
ALL-NATURAL & MANUFACTURED IN THE USA: Our tasty lickable cat high-calorie treats are proudly made with all-natural ingredients and manufactured in the USA. A portion of every sale supports the spay/neuter and transportation of pets from overpopulated areas of the USA to the Northeast for adoption. Shelf life: 24 months from manufacturing date. Product is labeled with ‘EXP MM/YY’ on the lid.

Bestseller No. 5

Thyroid Support for Cats, Natural Cat Appetite Stimulant & Cat Weight Gainer Drops – Helps Support Metabolism, Energy & Weight Gain for Cats – Vet-Formulated Herbal Liquid Supplement, 2 fl oz

THYROID BALANCE SUPPORT: If your cat’s energy swings between restless and tired, weight loss or their appetite and coat condition seem inconsistent, this gentle botanical thyroid support for cats can help restore natural balance. It’s crafted to support normal thyroid function and steady metabolism, encouraging smooth digestion, consistent energy, and a bright, healthy appearance—helping your cat feel comfortable, active, and well every day
CURB APPETITE & NORMAL WEIGHT: A well-balanced thyroid is key to how your cat eats, digests, and maintains energy. When metabolism slows or becomes erratic, appetite and weight can fluctuate. This herbal cat appetite stimulant helps support normal appetite and healthy weight by promoting efficient nutrient absorption and energy conversion. It encourages consistent eating habits, steady digestion, and a vibrant, nourished appearance—helping your cat stay strong and well-fed every day
HEART & NERVOUS SYSTEM: A healthy heart and calm nerves are vital to your cat’s overall comfort and vitality. This weight gain for cats formula helps support normal circulation, heart rhythm, and emotional balance, promoting a relaxed yet alert state. By encouraging smooth blood flow and stable energy, it helps maintain composure, confidence, and daily well-being—supporting your cat’s inner harmony and full-body vitality
VET-FORMULATED & SAFE NATURAL CARE: Expertly crafted under veterinarian guidance, this appetite booster for cats provides gentle, reliable thyroid and metabolism support without harsh chemicals or artificial additives. Unlike conventional pet medications, it’s made from 100% natural, non-GMO, and gluten-free plant ingredients to ensure purity and safety for long-term use. Every batch is carefully tested for quality—giving you total peace of mind with every drop
TRADITIONAL HERBAL BLEND: Inspired by centuries of botanical wisdom, this thyroid support supplement combines time-honored herbs used to promote inner balance, steady energy, and calm temperament in cats. Each ingredient is thoughtfully selected for its natural ability to support multiple body systems—metabolism, circulation, and relaxation—working together to encourage overall vitality. Made with pure, wild-crafted plant extracts, it reflects nature’s gentle yet effective approach to feline wellness

Bestseller No. 6

PET CARE Sciences 16fl Oz Liquid Cat Weight Gainer – High Calorie Cat Food Appetite Stimulant – High Calorie Booster for Cats – Supports Energy, Metabolism & Weight – Salmon Flavor – Made in The USA

CAT WEIGHT GAIN - Has your cat recently suffered from illness or injury which has caused them to lose weight or size? Or have you recently rescued a cat that needs a helping hand getting back to full health? PET CARE Sciences weight gain for cats is the product for you!
HIGH CALORIE SUPPLEMENT FOR CATS - Packed with protein and all the other natural supplements that your cat needs to regain lost weight and size.
SALMON OIL - Not only will your cat love the taste, the included salmon oil packs a load of additional benefits. Rich in Omega 3 and 6 it is a quick and easy way to rehydrate your cat's coat and skin. Helping to reduce both itchy and dry skin. Our cat weight gainer is not only great for your pets coat, it will also reduce joint inflammation and help to support your pets immune system and brain health.
WEIGHT GAIN FOR SENIOR CATS - Age is inevitable! This high-calorie cat supplement is not only designed for young cats, but also helps aging pets regain lost muscle mass and energy.
PET CARE Sciences - We know that your pet's health and happiness is incredibly important to you, and rightly so. PET CARE Sciences is here to help safely maintain the health of your precious pets. Made in the USA from naturally sourced ingredients to best support man’s best friend.

Bestseller No. 7

Cat Hyperthyroid & Gentle Weight Gain Support for Cats and Kittens - Natural Feline Thyroid Balance for All Ages in Odorless Easy to Use Tiny Pills That Improve Appetite, Coat & Energy (400 Pills)

EFFECTIVE NATURAL KITTY CARE - If your cat is restless, weak, has a matted coat or suddenly lost weight, it may be due to an overactive thyroid gland. Natural cat hyperthyroid supplements from BestLife4Pets can be an excellent alternative to harsh drugs or surgery.
HELPS BALANCE FELINE HORMONES - Use as a weight gain and appetite stimulant for cats, a restore healthy fur, or to help relieve vomiting or hyperactive behavior! Our Cat Hyperthyroid Formula is free of artificial ingredients, flavors, and alcohol.
NO FUSS, EASY TO USE - Works for Indoor/Outdoor and Feral Cats! Give the tiny pills whole, mixed with food, crushed, or dissolved in water. Flavorless and odorless thyroid support for cats, the tablets are not detected by cats' curious noses!
SAFE FOR ALL FELINE FRIENDS - From young kittens to senior cats in your rescue - our pills for hyperthyroidism in cats are safe for ALL breeds and long-term use. You may also combine it with any other medicine or pet supplement.

Bestseller No. 8

MYOS Feline Muscle Formula - Powered by Fortetropin for Senior Cats - Aids Weight Gain, Muscle Growth & Mobility Support - Natural, Cat Nutritional Supplement - 180 Servings

ENHANCED MOBILITY FOR SENIOR CATS - MYOS Feline Muscle innovative supplement is designed to improve mobility and muscle health, helping your senior cat maintain an active lifestyle and better manage their weight.
DESIGNED FOR RECOVERY AND GROWTH - MYOS Feline Muscle Formula is particularly beneficial for cats recovering from surgery or injury, as Fortetropin promotes muscle repair and growth, helping your cat regain their strength and vitality more quickly.
ALL NATURAL - Packed with the power of Fortetropin, this single-ingredient supplement is clinically proven to foster muscle growth and slow muscle loss in aging felines. Rich in amino acids, vitamins, and minerals.
EASY TO INTEGRATE INTO DIET - With its natural composition, MYOS Feline Muscle Formula is an effortless addition to your cat's meals. Simply sprinkle the palatable powder over their food to aid in weight management and support muscle growth.
OUR PROMISE TO YOU - Just contact us if for any reason you’re not happy with your purchase and we'll be sure to make it right.

The Ultimate Buying Guide: Choosing the Best Cat Food for Healthy Weight Gain

Is your feline friend a little too skinny? Getting your cat to a healthy weight is important for their overall happiness and health. Finding the right food can make a big difference. This guide will help you choose the best high-calorie cat food to safely help your cat gain weight.

Key Features to Look For

When shopping for weight-gain cat food, look for specific features that signal a high-quality, energy-dense product.

High Calorie Density: This is the most important feature. The food needs to pack more calories into a smaller serving size. Look for foods with higher kcal/kg (kilocalories per kilogram) listed on the label.
High Protein Content: Protein builds muscle mass, which is healthy weight, not just fat. Aim for a food where protein is the first or second ingredient.
Healthy Fats: Fats are the most calorie-dense nutrient. Look for beneficial fats like Omega-3 and Omega-6 fatty acids. These support skin, coat, and provide necessary energy.
Palatability: If your cat won’t eat it, it won’t help them gain weight! The food must taste great to encourage them to eat more.

Important Ingredients to Prioritize

The ingredients list tells the whole story. Good weight gain food uses quality sources for energy.

Animal Protein Sources: Chicken, turkey, salmon, or beef should be listed first. These provide the building blocks for muscle.
Digestible Carbohydrates: While cats are carnivores, some moderate, easily digestible carbs can add necessary calories. Look for ingredients like rice or sweet potato in small amounts.
Added Vitamins and Minerals: Weight gain is stressful on the body. Ensure the food is complete and balanced with necessary nutrients to support this process.

Factors That Improve or Reduce Quality

Not all weight-gain foods are created equal. Pay attention to what makes a food superior or inferior.

What Improves Quality:

High Digestibility: High-quality ingredients are easier for your cat’s body to absorb and use for energy.
Natural Preservation: Foods preserved naturally (like with Vitamin E) are generally better than those using artificial chemicals.

What Reduces Quality:

Excessive Fillers: Ingredients like corn gluten meal or excessive plant matter offer low nutritional value and can fill up your cat without providing dense calories.
Artificial Colors and Flavors: These mask low-quality ingredients and offer no benefit to your pet’s weight gain journey.

User Experience and Use Cases

How does this food fit into your life and your cat’s routine?

When to Use: Weight gain food is ideal for recovering sick cats, underweight senior cats, kittens during rapid growth, or cats with high energy needs (like outdoor cats). Always consult your vet before starting a weight gain plan.

Feeding Tips: Many owners find that wet (canned) food is more palatable and easier for underweight cats to consume than dry kibble. Try offering smaller, more frequent meals throughout the day to keep their energy intake steady.

Monitoring Success: Use this food as a tool, but monitor your cat weekly. You want to see steady, slow weight gain, not rapid spikes, which could indicate unhealthy fat gain.

Frequently Asked Questions (FAQ)

Q: How quickly should my cat gain weight on this food?

A: A healthy goal is usually 0.5% to 2% of their body weight per week. Fast weight gain is usually unhealthy. Consult your veterinarian for a specific target for your cat.

Q: Can I just feed my cat more of their regular food?

A: Sometimes, yes. However, if your cat is truly underweight or has a poor appetite, their regular food might not have enough calories per bite. Weight-gain formulas are designed to be more energy-dense.

Q: Is it safe to switch my cat to a high-calorie food suddenly?

A: No. Sudden diet changes upset a cat’s sensitive stomach. You must transition slowly over 7 to 10 days, mixing increasing amounts of the new food with decreasing amounts of the old food.

Q: Should I choose wet food or dry food for weight gain?

A: Many vets suggest wet food because it often has higher palatability (cats love the taste) and higher moisture content, which is great for overall health.

Q: What if my cat still won’t eat the new food?

A: Try warming the wet food slightly—this enhances the smell and makes it more appealing. If that fails, you may need to try a different brand or formula, as taste preference is very strong in cats.

Q: Does high-calorie food always mean high-fat food?

A: Not necessarily. Good weight-gain foods are high in *both* healthy fats and high-quality protein to ensure they build muscle mass alongside necessary energy reserves.

Q: Are there any ingredients I must absolutely avoid?

A: Avoid foods high in artificial preservatives, excessive fillers like corn or wheat, and any ingredients your specific cat might be allergic to.

Q: How long should I feed my cat this specialized food?

A: Feed this food until your cat reaches a healthy weight, as determined by your vet. After that, you should transition them back to a maintenance diet appropriate for their age and activity level.

Q: Is this food okay for kittens?

A: Some high-calorie recovery foods are safe for kittens, but kittens have very specific nutritional needs. Always choose a food specifically labeled for “growth” or consult your vet first.

Q: Can stress cause my cat to lose weight?

A: Yes. Stress, illness, or dental pain often cause weight loss. If your cat is losing weight despite eating well, a vet visit is crucial to rule out underlying medical issues before relying solely on diet change.