Skip to content Skip to footer

Weight Gain & Recovery Liquid for Pets

  • Weight Gain & Appetite Stimulant
  • The #1 Ingredient is Omega Fish Oil
  • Contains 29 Vitamins & Minerals
  • Helps Older Pets Maintain Weight
  • Vet-Reviewed for Puppies & Adults
  • Easy to Use, Add to Water or Food



Norton Shopping Guarantee

Suitable for:

  • Underweight Pets
  • Sick or Recovering Pets
  • Older Pets to Gain or Maintain Weight
  • Working & Sporting Animals for Extra Energy
  • Pregnant and Lactating Pets

Nutrition Facts:

Are you worried about your furry companion's lack of energy? Are they undernourished or not growing properly?

Our Veterinarian Reviewed weight gainer for cats and dogs is uniquely formulated to help your pet gain healthy weight, increasing their energy, immunity and appetite.

At Miracle Vet, we understand that every pet deserves to thrive and lead a healthy, active life. Our Liquid Weight Gainer is not just another supplement, it's a game-changer that will transform your fur baby’s well-being.

  • Quick and easy weight gain - Adding healthy nutrient dense calories has never been easier, a few drops into their food or water and boost their energy levels quickly.
  • Great tasting appetite stimulant - Your pet will drool over the tasty liquid and before you know it, they will be hungry for more food.
  • Natural with Added Vitamins & Minerals - Healthy weight gain requires high quality fats and proteins, our veterinarian recommended formula is packed with omegas, proteins and vitamins for increased energy and overall health.

Customers of this bestselling weight gainer have noticed visible results in weeks, sometimes days, as your cat or dog gains strength, vitality, and starts to look healthier with a shinier coat and increased appetite.

Fast, Healthy Weight Gain

Fast results, don’t delay! Our Weight Gainer for dogs and cats is designed to deliver fast and noticeable changes in your pet's appearance and energy levels. Within weeks, you'll witness their coat becoming shinier, their muscles becoming stronger, and their overall health improve.

Nutritionally Balanced with Natural Ingredients

Packed with a carefully balanced, veterinarian reviewed blend of essential nutrients, vitamins, and high-quality proteins, our Weight Gainer provides the fuel your pet needs to build lean muscle mass and maintain an optimal weight. Say goodbye to skinny frames and hello to a robust, well-toned physique.

Using fish oils as the primary fat source your cat or dog will get healthy omegas supporting brain function, eyesight, heart health and also nourishing their skin and fur.

An underweight dog, or malnourished cat, is likely to be lacking in essential vitamins which will be contributing to their overall health. We have packed our liquid weight gainer full of the most important vitamins that most recovering pets are missing.

This includes Vitamin A,  Vitamin D3, Vitamin E, Biotin, Folic Acid, Niacin, Pantothenic Acid, Vitamin B1, Vitamin B2, Vitamin B6, Vitamin B12, Vitamin C, Vitamin K1, Copper, Iodine, Iron, Manganese, Selenium, Zinc, Choline, Calcium, Taurine, Lecithin.

This specialized nutritional formula means whatever your pet's weight gain needs, from pregnancy, recovery from illness or surgery, to building healthy muscles, we have you covered.

Weight Gain Supplement for All Breeds

Whether you have a tiny Chihuahua or a majestic Great Dane, our Weight Gainer caters to pets of all breeds and sizes. Our carefully formulated recipe ensures that each furry friend receives the precise combination of nutrients they need for optimal growth, regardless of their unique requirements.

Irresistible Taste

We understand that getting your pet to eat when they are underweight or lethargic can be a challenge. That's why our Weight Gainer is developed with a tasty mouthwatering flavor that will have your pet begging for more. A few drops to start in their food or water, or syringed directly into their mouths will help them get enough nutrients to start to feel better and stimulate their appetite. It's the perfect treat that they'll happily consume, making it easier for you to keep them on track to reach their weight goals.

Enhance Your Cat/Dog’s Quality of Life

Imagine the joy of seeing your cat bounding with energy, effortlessly chasing toys, or your dog playing and keeping up with you on long walks. Our Weight Gainer not only improves their physical appearance but also boosts their overall vitality, ensuring a happier, more fulfilling life for your beloved companion.

Vet-Approved Liquid Weight Gainer

At Miracle Vet, your pet's health and well-being are our top priorities. That's why our Weight Gainer is formulated in collaboration with leading US veterinarians and nutrition experts. You can trust that every unit of MiracleVet's Liquid Weight Gainer is backed by scientific research and manufactured to the highest standards of quality and safety.

Don't settle for less when it comes to your pet's well-being. Choose Miracle Vet's Weight Gainer and see a happier and healthier four legged friend. 

Experience the joy of a re-energized pet who radiates strength, vigor, and a newfound zest for life.

Order now and give your pet the gift of optimal health and vitality.

Omega Fish Oil, Canola Oil, Purified Water, Dextrose, Whey Protein, Bacon Flavor (natural), Vegetable Lecithin, Vitamin Supplement Mix (Vitamin A Palmitate, Beta Carotene, Cholecalciferol, dl-alpha-Tocopheryl Acetate, Biotin, Folic Acid, Niacinamide, Calcium d-Pantothenate, Thiamin HCl, Cyanocobalamin, Riboflavin, Pyridoxine HCl, Ascorbic Acid, Phytonadione, Copper Gluconate, Potassium Iodide, Ferrous Fumarate Manganese Sulfate, Sodium Selenite, Zinc Sulfate, Choline Bitartrate, Calcium Carbonate, Taurine, Polysorbate, Sorbic Acid, Calcium Propionate (to maintain freshness), Caramel Color (natural), Xanthan Gum, Rosemary Extract

Miracle Vet may be added to water, to dry or wet food, or administered by mouth using a syringe (for animals that are unable to eat solid foods). When diluted with water, Miracle Vet helps combat dehydration.


Puppies: 1 teaspoonful per 5 lbs of body weight daily

Adult dogs: 2 tablespoons per 30 lbs of body weight 3 times daily


Kittens: ½ teaspoonful daily

Adult cats: 1 teaspoonful daily

Other animals

Horses: 3 oz 3 times daily

Calves: 2 oz 3 times daily

Piglets: 1 oz 3 times daily

Cattle: 3 oz 3 times daily

Goats: 1 oz 3 times daily

Sheep: 1 oz 3 times daily

We recommend to begin with half the suggested amount and gradually increase to the full suggested amount.

Storage: Store in a cool, dry place away from sunlight. Keep the container tightly closed.

Cautions: For animal use only. Keep out of reach of children. This product is intended for intermittent or supplemental feeding only. Since individual results may vary, discontinue if you notice adverse reactions. In case of accidental overdose, contact a health care professional.

This product is not intended to diagnose, treat, cure, or prevent any disease. Please consult your veterinarian regarding any change in treatment or supplementation.

How much weight will my pet gain?

Dogs & cats gain an average of 8-10 pounds from a half gallon of Miracle Vet.

How old does my pet need to be?

Miracle Vet is safe for all breeds of dogs & cats ages 4 weeks and older. It's even safe for cats and kittens.

How do I use Miracle Vet?

Miracle Vet Weight Gain Liquid can be administer by mouth using a dropper or syringe, added to your pet's water, or added to your pet's food. They love the taste and will even eat it right off of a spoon.

Is it for all breeds?

Yes. Miracle Vet Weight Gain Liquid works for all types of animals. Not only is it safe for dogs and cats, it's also safe for live stock, cattle, sheep, and horses to name a few.

Is it safe?

Yes. Unlike other brand that contain unhealthy trans fats, Miracle Vet is 100% safe. This all-natural formula was formulated by a doctor with a phd in biochemistry and over 30 years of experience in the industry.

Are there negative side effects?

No. Miracle Vet is the only brand that will have a positive effect on your dog's health with zero negative side effects.

How fast until I see results?

Results are seen within 72 hours. The longer you use Miracle Vet, the more results you will see. It's safe to use year round.

Do the results last?

Yes. As long as you feed your dog the recommended amount of dog food each day, the weight gained while using Miracle Vet will be not be lost.

Shipping & Guarantees


Satisfaction Guarantees

  • Expert Support Team
  • Payment Security
  • Always in Stock
  • Guaranteed Lowest Price
product review default image