Weight Gain | Weight Gain Supplement for Dogs

Weight Gain | Weight Gain Supplement for Dogs

  • 563 calories per 100g
  • High-quality protein + energy-rich fats
  • Irresistible plant-based meaty flavour even fussy eaters can’t resist
  • Added Actigen Prebiotic (MRF) for gut health and nutrient absorption
  • Added Taurine for heart health, muscle support and fat digestion
  • Suitable for dogs 12 weeks+, including pregnant and nursing dogs
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Price range: £27.95 through £75.55 or subscribe to save 25%

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  • You want to see your dog thrive ribs hidden, eyes bright, tail wagging. But whether they’re a fussy eater turning their nose up at every meal, a rescue dog arriving underweight, a dog recovering from illness, or a senior who’s lost their appetite, getting the calories and nutrition into them can feel like a constant battle.

    Aviform Weight Gain is a premium high-calorie, high-protein meal topper powder specifically formulated to help dogs reach and maintain a healthy weight quickly, safely, and deliciously.

    Unlike generic weight gainers that simply pack in empty calories, Aviform Weight Gain goes further. Our one-of-a-kind formula combines a proven calorie-dense base with two uniquely added ingredients Actigen prebiotic (MRF) and Taurine  to ensure your dog doesn’t just gain weight, but gains it the right way: with stronger digestion, better nutrient absorption, and full metabolic support.

    Simply sprinkle on their food. That’s it.

    Who is Aviform Weight Gain for Dogs for?

    This supplement is ideal for:

    • Underweight or malnourished dogs
    • Rescue dogs rebuilding their condition after neglect or starvation
    • Fussy or picky eaters who pick at their food or skip meals
    • Dogs recovering from illness, surgery or prolonged stress
    • Senior dogs who have lost appetite or muscle mass
    • Rapidly growing puppies needing caloric support (12 weeks+)
    • Nursing and pregnant dogs with higher nutritional demands
    • Working dogs or high-energy breeds that burn through calories
    • Dogs on high-energy diets that need metabolic support

    Give your dog the weight gain support they truly deserve

    Aviform Weight Gain is the smarter choice for owners who don’t want to just pile calories into their dog; they want those calories to count. With a proven high-calorie, high-protein formula enhanced by a clinically recognised prebiotic and taurine, it’s the most complete weight gainer supplement available for dogs.

    Your dog worked hard to find you. Help them be the healthiest version of themselves.

  • High-Calorie, High-Quality Nutrition

    Every scoop of Aviform Weight Gain contains 43 high-quality calories. At 563 calories per 100g, this is one of the most calorie-dense supplements available. But calories only matter if they’re the right kind – that’s why our formula is built around high-quality protein and healthy fats to promote lean muscle gain, not just fat storage.

    Builds Lean Muscle Mass

    Soy protein and pumpkin protein provide a complete protein profile to support muscle maintenance, recovery and growth. Combined with essential amino acids, Aviform Weight Gain helps your dog build real, functional body condition  not just weight on the scales.

    Irresistible Appetite Stimulant

    Our natural meat flavour makes this supplement so palatable that even the most reluctant eaters are drawn to their bowl. Simply sprinkle on wet or dry food. No mixing with water required. Perfect for fussy dogs, sick dogs, or seniors whose appetite has declined.

    Supports Healthy Skin & Coat

    Flaxseed provides omega-3 and omega-6 fatty acids, while coconut milk adds healthy fats that promote a shiny, strong coat and support skin health as your dog regains condition.

    Gentle on Digestion

    Pumpkin protein brings natural fibre to support healthy digestion, while the formula as a whole is designed to be easy on even sensitive stomachs. Helping your dog gain weight shouldn’t mean upsetting their gut  and with Aviform, it doesn’t.

    Added Actigen Prebiotic (MRF) 

    Aviform Weight Gain includes Actigen, a Mannan-rich fraction (MRF) prebiotic, making it the only weight gain supplement for dogs to include this clinically recognised ingredient. Here’s why this matters when you’re trying to help a dog gain weight:

    • Nutrient Absorption: High-fat, high-protein formulas only work if those calories are actually absorbed. A healthier gut microbiome improves digestion efficiency — more absorption means better weight gain, and less food going to waste.
    • Stool Quality: High-calorie diets can cause loose stools. The prebiotic helps stabilise the gut environment so you don’t end up with a skinny dog AND loose stools.
    • Immune Support: Around 70% of immune tissue is associated with the gut. Underweight dogs are often stressed, ill, or nutritionally depleted. Supporting gut bacteria helps build immune resilience while they regain condition.
    • Gut Lining Integrity: When beneficial bacteria ferment prebiotics, they produce short-chain fatty acids like butyrate, which supports the gut lining, reduces inflammation and improves nutrient uptake.

    Added Taurine 

    Taurine is an amino-sulfonic acid that plays a critical role in heart function, bile acid formation, retinal health and muscle contraction. While most dogs can produce taurine from other amino acids, they may not always do so optimally – particularly when they are underweight, recovering from illness, on high-energy diets, or are breeds predisposed to taurine deficiency.

    In a weight gain context, this matters enormously:

    • Heart Health: Low taurine has been linked to dilated cardiomyopathy in some dogs. When you’re deliberately increasing a dog’s caloric intake and growth rate, you’re also increasing metabolic demand on the heart. Taurine smooths that out.
    • Skeletal Muscle Function: When the goal is lean mass, not just fat gain, taurine plays a direct role in skeletal muscle contraction and recovery.
    • Fat Digestion: Taurine helps form bile salts, which are essential for digesting dietary fat, especially important in a high-fat formula like this one.
    • Immune & Antioxidant Support: Taurine has antioxidant properties that help dogs rebuild condition from the inside out.

    Put simply: Aviform Weight Gain doesn’t just make dogs heavier. It makes them stronger and metabolically supported throughout the process.

  • Ingredient What it does
    Soy Protein Complete protein source to build lean muscle and support satiety. Non-GMO.
    Flaxseed Rich in omega-3 and omega-6 fatty acids to support growth, skin health and natural immunity.
    Coconut Milk High in healthy fat for weight gain. Supports coat condition and freshens breath.
    Pumpkin Seed Protein Natural source of protein and calcium. Supports muscle maintenance and healthy digestion.
    Vegetable Powder Full-spectrum vitamins, minerals and iron to replenish depleted nutrients and support overall health.
    Actigen MRF Prebiotic Improves gut microbiome, boosts nutrient absorption, stabilises stool quality and supports immune resilience.
    Taurine Supports heart health, fat digestion, skeletal muscle function and antioxidant protection during high-calorie refeeding.
    Nutrient Amount
    Crude Protein 38%
    Crude Fat 44%
    Crude Fibre 3%
    Crude Ash <2%
    Calories per 100g 563
    Calories per 7g scoop 43
  • Aviform Weight Gain couldn't be simpler. Add the recommended number of scoops to your dog's regular food wet or dry once per day. The irresistible meaty flavour does the rest.
    Dog Weight Daily Amount 1 300g Tub Lasts 2 x 300g Tubs Lasts3 x 300g Tubs Last
    Up to 10kg 1 scoop per day 42 days86 days129 days
    10–25kg 2 scoops per day 21 days43 days64 days
    25–40kg 3 scoops per day 14 days29 days42 days
    Over 40kg 4 scoops per day 10 days21 days32 days
    Scoop included. Store in a cool, dry place away from direct sunlight. Ensure tub is tightly sealed after use.
    1 scoop = 7g approximately
    Suitable for dogs aged 12 weeks and over, including pregnant and nursing dogs.
    Not suitable for dogs with pancreatitis due to high fat content.
  • Q: What makes Aviform Weight Gain different from other weight gainers?

    A: Aviform Weight Gain is the only dog weight gain supplement that includes both Actigen MRF prebiotic and Taurine alongside a proven high-calorie, high-protein base. Most weight gainers simply add bulk calories. Aviform ensures those calories are absorbed efficiently, digested comfortably and supported by the nutrients your dog’s heart, muscles and gut need during refeeding.

    Q: How many calories are in Aviform Weight Gain?

    A: Each 7g scoop contains 43 high-quality calories. Per 100g, the product provides over 563 calories — making it one of the most calorie-dense supplements on the market.

    Q: Can I use this alongside my dog’s regular food?

    A: Yes. Simply sprinkle the recommended scoops on top of your dog’s existing wet or dry food daily. You don’t need to change their diet  Aviform Weight Gain works as a meal topper.

    Q: Will fussy dogs actually eat it?

    A: The natural meaty flavour is highly palatable and acts as an appetite stimulant. The flavour comes from natural flavourings and does not contain meat which means it’s suitable even for dogs with meat allergies. Most dogs take to it immediately, even those that have previously been reluctant eaters.

    Q: Can it be given to pregnant or nursing dogs?

    A: Yes. Aviform Weight Gain is suitable for pregnant and nursing dogs as well as puppies from 12 weeks of age.

    Q: Why is there a prebiotic in a weight gainer?

    A: When you increase a dog’s calorie and protein intake, you’re placing greater demand on their digestive system. The Actigen MRF prebiotic helps ensure those extra calories are actually absorbed not wasted. It also helps prevent loose stools, a common side effect of high-calorie diets, and supports the gut immune system which is often compromised in underweight or recovering dogs.

    Q: Why does a Weight Gain need taurine?

    A: As you increase caloric load and growth rate, you increase metabolic demand on the heart and digestive system. Taurine supports heart function, helps form bile salts essential for fat digestion, and supports skeletal muscle so you’re not just making your dog heavier, you’re making them stronger and more metabolically resilient. This is particularly important for breeds with known taurine sensitivities and for dogs in recovery.

    Q: Is it suitable for dogs with food allergies?

    A: Aviform Weight Gain is plant-based and the meaty flavour is derived from natural flavourings  making it suitable for dogs with chicken or  meat allergies. The product does contain gluten-containing ingredients, so if your dog has a gluten sensitivity, please consult your vet before use.

    Q: Is it suitable for dogs with pancreatitis, diabetes or colitis?

    A: No. Due to its high fat and protein content, Aviform Weight Gain is not suitable for dogs with pancreatitis, diabetes, colitis, or dogs on a prescribed low-fat diet. Please consult your vet if your dog has any existing health conditions.

    Q: Can it be used long-term?

    A: Yes. Aviform Weight Gain can be used daily on an ongoing basis. Once your dog reaches their target weight, you may wish to reduce the amount or continue at a maintenance level  adjust according to your dog’s individual needs.

    Q: Can I use Aviform Weight Gain alongside other supplements or medication?

    A: Yes, in most cases. If your dog is currently on medication or other supplements from another brand, we recommend checking with your vet first.

    Q: How quickly will I see results?

    A: Results vary depending on your dog’s starting condition, metabolism, and how consistently the supplement is used. Many owners report visible improvement within a few weeks of daily use.