10 Best Dog Food Supplements Weight Gain in The UK

Last updated on 25/07/2025
Advertising disclosure
Best Choice
1
9.8
Exceptional
Ace Antlers Venison Flavoured Weight Gainer for Dogs 1kg - Rich in protein, Helps Build Muscle, Aids Recovery and Great for Fussy Eaters.
Ace Antlers
Ace Antlers Venison Flavoured Weight Gainer for Dogs 1kg - Rich in protein, Helps Build Muscle, Aids Recovery and Great for Fussy Eaters.
Free Shipping
Why We Love It
  • Natural ingredients for recovery.
  • Expertly formulated by nutritionist.
  • Made with love in the UK.
Main Highlights
  • Used for aiding recovery, appetite stimulation, building muscle, gaining weight and maintaining weight in dogs.
  • Contains just four natural ingredients and no hidden nasties. Rich in natural protein, fat and carbohydrates.
  • Formulated by a leading Sporting Dog Nutritionist in the UK and lovingly trialled by her dogs.
  • Made and packed by us in the UK. Free from any additives, preservatives or other artificial ingredients.
9.8
Exceptional
Amazon Logo
Best Value
2
9.8
Exceptional
Save 4%
Buddy & Lola Dog Weight Gainer Supplement - Protein For Dogs, Helps Build Muscle, Aids Recovery, Great for Fussy Eaters, A Must Have For Rescue Dogs Who Need to Gain Weight and Build Muscle
Buddy & Lola
Buddy & Lola Dog Weight Gainer Supplement - Protein For Dogs, Helps Build Muscle, Aids Recovery, Great for Fussy Eaters, A Must Have For Rescue Dogs Who Need to Gain Weight and Build Muscle
4% OffFree Shipping
Why We Love It
  • Boosts dog’s weight and mass.
  • Enhances muscle recovery and endurance.
  • Supports overall canine health.
Main Highlights
  • THE ULTIMATE DOG FOOD SUPPLEMENT: Our yummy meal topper is formulated with essential nutrients and high calorie proteins to help your dog gain healthy mass and weight. Simply add the powder to your dog's food and monitor the results over the next few weeks.
  • MAXIMIZE ENERGY: We understand how important energy and proteins are for building your dog's muscle mass and weight. Proteins are also essential for the ongoing development of lean muscles in dogs and that's why we have developed this awesome weight gainer dog supplement that will maximize protein intake for the optimum health of your dog.
  • PERFECT SUPPORT FOR HEALTHY WEIGHT GAIN: Our weight gainer for dogs is formulated to help support muscle endurance, muscle recovery, muscle performance, and muscle building. It is also formulated to provide essential nutrients to add healthy weight and support overall muscle strength in dogs and to target muscle fatigue.
  • PERFECT FOR PUPPIES & NURSING MOTHERS: Great for a nursing mother and puppies to support growth and development of body tissue. Helps to support ATP levels, blood glucose levels, supports muscle recovery after a long walk or prolonged workout and contains healthy fats to support healthy skin and shiny coats.
  • MADE IN UK: We care passionately about your dog’s health and the wellbeing of dogs is our primary motivator. All the ingredients used in formulating this special powdered supplement for dogs are strictly subject to guidelines. We have consistent quality standards which we can stand by hand on heart. We advise speaking to your vet first for specific advice around the suitability of this product to ensure it is suitable for them.
9.8
Exceptional
Save 4%
Amazon Logo
3
9.8
Exceptional
ProDog Muscle+ Dog Weight Gainer - Advanced Nutrition 76% Protein Per Scoop & Omega 3,6,9 - Supplement for Muscle Growth & Recovery, Underweight, Malnourished Dogs (30 Servings)
ProDog
ProDog Muscle+ Dog Weight Gainer - Advanced Nutrition 76% Protein Per Scoop & Omega 3,6,9 - Supplement for Muscle Growth & Recovery, Underweight, Malnourished Dogs (30 Servings)
Free Shipping
Why We Love It
  • Muscle gain and development.
  • Healthy weight management solution.
  • Supports overall health vitality.
Main Highlights
  • THE FACTS - Dogs lose up to 20% muscle mass after age 7, and senior dogs need 50% MORE protein to maintain muscle health. Our weight gainer food topper is specially formulated with high-quality protein and essential nutrients to support muscle repair and growth in any dog.
  • BUILD MUSCLE & STRENGTH - ProDog Muscle+ is loaded with ProDog’s signature tri-protein blend of hemp, kelp, and pea protein, delivering an industry-leading 76% quality protein per serving, ensuring the entire amino acid spectrum needed to support optimum physical condition is provided in abundance.
  • HEALTHY WEIGHT GAIN - The quality protein-rich formula, combined with rolled oats and fish collagen, assists underweight or malnourished dogs to gain weight healthily. The expertly formulated mix of species-appropriate ingredients provides premium nutrient-dense dietary support with absolutely zero unhealthy or artificial bulking agents or filler ingredients
  • BOOST VITALITY & IMMUNITY - This advanced formula boosts overall health and vitality by replenishing essential vitamins and minerals lost through an active lifestyle. With bioavailable ingredients, fish collagen, and oil, it supports the immune system, promotes a balanced inflammatory response, and aids natural detoxification and energy production.
  • GENTLE ON SENSITIVE STOMACHS - Muscle + is made with 100% species-appropriate ingredients, featuring 76% of ProDog’s tri-protein blend. This blend is gentle on sensitive stomachs and avoids dairy-based proteins like whey. Enhanced with L-glutamine, it supports digestion and optimal nutrient absorption.
9.8
Exceptional
Amazon Logo
4
9.6
Superb
RECOACTIV Immune Tonic for dogs, 3 x 90 ml, dietary restoration for low appetite, liquid nutritional supplement for dogs
RECOACTIV
RECOACTIV Immune Tonic for dogs, 3 x 90 ml, dietary restoration for low appetite, liquid nutritional supplement for dogs
Free Shipping
Why We Love It
  • Boosts dogs' immune system.
  • Natural, food-quality ingredients.
  • Easily administered liquid formula.
Main Highlights
  • APPLICATIONS: RECOACTIV Immune Tonic for dogs was developed to support your dog and its immune system. It stimulates appetite.
  • INGREDIENTS: The formula contains valuable ingredients which cover your pet’s requirements of vital nutrients to boost the immune system. All RECOACTIV products include essential vitamins and trace elements, and consist of natural, food quality ingredients. They are free of grains, sugar, dyes and preservatives.
  • INTAKE: Thanks to its liquid formula, the restorative is very easily resorbed, even by pets with mouth and throat issues. It is very comfortable to administer.
  • ACCEPTANCE: Thanks to its great palatability and digestibility, cats enjoy taking the product, making it a popular dietary supplement food.
  • QUALITY OF LIVE: Refusal to eat due to weakness, illness and/or surgery can occur in dogs of any age. RECOACTIV develops products that give your pet new energy and allow it to lead a comfortable life.
9.6
Superb
Amazon Logo
5
9.5
Superb
Gain 28 Greyhound Lurcher Performance Racing Working 28% Protein Dog Biscuit 15KG
GAIN
Gain 28 Greyhound Lurcher Performance Racing Working 28% Protein Dog Biscuit 15KG
Why We Love It
  • High protein for active dogs.
  • Pack size is economical.
  • Ideal for Greyhound Lurchers.
Main Highlights
  • Gain 28 Greyhound Lurcher Performance Racing Working 28 Protein Dog Biscuit 15KG
  • Brand : GAIN
  • Product type: PET FOOD
  • 15 kg Pack of 1
  • lurcher
9.5
Superb
Amazon Logo
6
9.4
Superb
Save 7%
Hench Range Dog Weight Gainer- Healthy Weight Gain Supplement With Natural Ingredients Premium Nutrition for Stronger Leaner Dogs
AAC Advanced Animal Care
Hench Range Dog Weight Gainer- Healthy Weight Gain Supplement With Natural Ingredients Premium Nutrition for Stronger Leaner Dogs
7% OffFree Shipping
Why We Love It
  • Promotes healthy weight gain.
  • Nourishes skin and coat.
  • Supports immune system strength.
Main Highlights
  • Premium Dog Weight Gainer Supplement: Specially formulated to promote healthy weight gain and muscle growth for underweight dogs, featuring natural flaxseed oil, chicken liver powder, and whey protein powder for a nutrient-rich boost
  • Natural Ingredients for Holistic Health: Made with flaxseed oil, evening primrose oil, sunflower oil, rosemary extract, and milk thistle, offering a natural supplement that supports overall wellness without artificial additives
  • Supports Skin & Coat Vitality: Enriched with omega-3 fatty acids (EPA & DHA), evening primrose oil, and biotin, this dog supplement nourishes dry skin and promotes a shiny coat for a healthier appearance.
  • Enhances Liver Health & Detoxification: Contains milk thistle and chicken liver powder to support liver function and aid in natural detoxification, ideal for dogs needing liver support.
  • Boosts Joint Mobility & Energy: Includes essential fatty acids, zinc, manganese, and taurine to improve joint health and maintain energy levels, keeping your dog active and playful.
  • Strengthens Immune System: Packed with vitamins A, C, D3, E, B-complex (B1, B2, B6, B12), folic acid, vitamin K1, iron, selenium, and copper, this supplement enhances your dog’s immune system strength.
  • Ideal for Underweight Dogs: Perfect for pets needing to gain weight, improve muscle growth, or recover from low energy, offering a balanced diet addition under veterinary guidance. Safe & High-Quality Formula: Formulated with lecithin, choline, and tocopherols for added nutritional support, ensuring a safe and effective pet supplement for all dog breedsall dog breedscken liver taste that dogs love, making it perfect for daily supplemental feeding.
  • Usage Instructions: For intermittent or supplemental feeding only – mix the recommended amount into your dog’s meals daily. Consult a veterinarian for dosage based on your dog’s weight and needs
9.4
Superb
Save 7%
Amazon Logo
7
9.3
Superb
Tomlyn Nutri-Stat Malt-Flavored High Calorie-Nutritional Gel for Dogs & Cats, 4.25oz
Tomlyn
Tomlyn Nutri-Stat Malt-Flavored High Calorie-Nutritional Gel for Dogs & Cats, 4.25oz
Why We Love It
  • Vet-recommended for fussy eaters.
  • Supports heart, skin, joints.
  • Palatable, easily-digested, calorie boost.
Main Highlights
  • Nutritional oral gel for pets who need extra calories and vitamins; ideal for pets refusing food
  • Appetite stimulant, calorie booster, weight gainer for fussy eaters; veterinarian recommended
  • Nutri-Stat high-calorie gel; concentrated source of vitamins and minerals, ideal for growing pets
  • Contains omega-3 and omega-6 essential fatty acids to support healthy heart, skin and joints
  • Palatable, simple to administer, easily-digested gel; accessible calories support a healthy appetite
9.3
Superb
Amazon Logo
8
9.2
Superb
The Hunger of the Wolf Dry Dog Food - For All Breeds and Working Dogs, High Calorie and High Energy Formula with Chicken, Adult - 14 kg
The Hunger of the Wolf
The Hunger of the Wolf Dry Dog Food - For All Breeds and Working Dogs, High Calorie and High Energy Formula with Chicken, Adult - 14 kg
Free Shipping
Why We Love It
  • High protein and fat content.
  • Powerful antioxidants slow aging.
  • Delicious, meat-based dog food.
Main Highlights
  • High protein (32%) and fat (21%) content - this food has been specially developed to meet the nutritional requirements of active, sporting and working dogs.
  • Contains plant extracts: Rosemarinus, Vitis, Curcuma, Citrus, Eugenia - powerful antioxidants which slow down cell damage and the aging process.
  • No added gluten, free of soya and chemical dyes. No artificial preservatives. Only natural antioxidants.
  • The real label - 300 g of dried chicken in 1 kg of food corresponds to 1140 g of fresh meat. In The Hunger of The Wolf dog food we use a meal or dried meat so we do not claim very high content of raw meat only to make the labels look much better to the consumer than they really are. Raw meat may contain 70%-90% water. For example chicken meal is simply fresh chicken that has already been cooked to remove moisture – this makes it a much more highly-concentrated source of protein.
  • A delicious taste your dog will love - by creating this dog food we remembered about ancestors of dogs - wolves, which are true carnivores, therefore, the main ingredient of our food is always meat.
9.2
Superb
Amazon Logo
9
9.1
Superb
Save 15%
HENCH RANGE EMPOWER Dog Muscle Builder All Breeds Muscle Gainer for Dogs Bully Maximum Gain Strength Energy Chew
AAC Advanced Animal Care Ltd
HENCH RANGE EMPOWER Dog Muscle Builder All Breeds Muscle Gainer for Dogs Bully Maximum Gain Strength Energy Chew
15% OffFree Shipping
Why We Love It
  • Maximize muscle growth naturally.
  • Improve power and performance.
  • Enhance strength and stamina.
Main Highlights
  • Maximise Muscle & Growth
  • IMPROVE POWER + PERFORMANCE
  • ENHANCE STRENGTH + STAMINA
  • HIGHLY EFFECTIVE FORMULA
  • SAFE EFFECTIVE Contains NO steroids . NO GMO NATURAL FORMULA
9.1
Superb
Save 15%
Amazon Logo
10
9.0
Superb
Save 12%
ROYAL CANIN Mini Light Weight Care - 3kg
ROYAL CANIN
ROYAL CANIN Mini Light Weight Care - 3kg
12% Off
Why We Love It
  • Premium quality pet food.
  • Ideal for small breeds.
  • Helps maintain healthy weight.
Main Highlights
  • Royal Canin Mini Light Weight Care 3Kg
  • Brand : Royal Canin
  • Product Type : Pet Food
  • Color: Size: Black
  • Size : 3 Kg
9.0
Superb
Save 12%
Amazon Logo