Muscle+ Dog Weight Gainer Supplement
ProDog’s best selling, high-specification weight gainer for dogs, expertly formulated for healthy muscle gain and weight gain. This vet approved supplement delivers a powerful 76% premium protein per scoop, using a blend of high quality, bioavailable ingredients. Ideal for dogs needing to reach a desirable weight in a safe and healthy way or requiring a dog muscle builder to support recovery, maintain weight, or optimise condition. Simply mix into any meal—perfect for even the fussiest eaters.
Read MorePart of our dog supplements range, Muscle+ is a premium dog weight gain supplement, created by expert canine nutritionists, recommended by vets and suitable for dogs 24weeks +. If you’re looking for a high-calorie food for dogs, Muscle + could be the answer. Every scoop fuels healthy weight gain for dogs through clean, nutrient dense, functional ingredients —no fillers, just performance focused nutrients.
Muscle+ features ProDog’s signature tri-protein blend, fish collagen, pumpkin seed, and a precisely balanced amino acid profile. This expertly balanced formulation supports:
- Healthy weight gain for underweight dogs
- Maintenance of ideal weight during recovery or restricted diets
- Dog muscle builder for active, working or under-muscled dogs
- Nutritional assistance during growth phases or performance training
- Boosting protein for dogs needing increased energy or muscle tone
- Looking for how to build Muscle on a dog naturally? Muscle+ is your answer
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Built Like A
The Benefits of ProDog Muscle+
This powerhouse fusion of bioavailable ingredients support 5 key areas:
1Muscle and Power
ProDog Muscle+ is loaded with our signature tri-protein blend of hemp, kelp and pea, delivering an industry leading 76% quality protein per serving. This complete amino acid spectrum supports optimal physical condition, helping to build Muscle on a dog naturally. The blend fuels muscle gain and development, aiding long lasting strength and definition, while being gentle on digestion, making it a smart choice as a dog muscle builder and protein powder for dogs.
2Weight management
This dog weight gain supplement is built around high quality protein, not empty calories. By combining a concentrated tri-protein blend with rolled oats and fish collagen, Muscle+ delivers nutrient dense support to help underweight, malnourished, or recovering dogs reach and maintain a healthy weight. Every scoop offers clean, functional fuel with zero fillers, making it an ideal addition to any dog food for weight gain strategy, without compromising digestive health.
3Physique
To bulk up your dog naturally, they need more than just Muscle. Strong joints and connective tissue are essential. The fish collagen and natural oil content in Muscle+ deliver Omega-3, 6, and 9 fatty acids to support joint lubrication, brain function, and digestive health. When combined with glucosamine, this formulation supports joint care in dogs, helping to maintain flexible cartilage and overall structural integrity.
4Vitality
The bioavailable ingredients in Muscle+ work in synergy to support energy production, immune health, and the body’s natural detox pathways. Fish collagen, amino acids, and rolled oats contribute to a balanced inflammatory response, helping to regulate glandular function, heart health, blood pressure, and nervous system function. This makes Muscle+ a valuable dog weight gainer for long-term vitality and wellbeing.
5Digestion
Packed with natural ingredients, Muscle+ contains 76% of ProDog’s soy-free tri-protein blend in each scoop. It’s gentle on sensitive stomachs and ideal for dogs who react poorly to dairy based proteins like whey. The addition of L-glutamine supports gut health and promotes effective nutrient absorption, making this a high-performance option for dogs that need digestive support alongside a high calorie dog food or weight gainer.
We’re so confident you’ll love our product that we are offering a 30 Day Money Back Guarantee.
Packed with natural ingredients
Tri-Protein Blend
A complete source of protein for dogs, combining hemp, kelp, and pea to deliver all essential amino acids needed to maintain healthy muscle tissue. This distinctive natural protein blend is gentle on digestion, making it ideal for dogs sensitive to dairy based proteins commonly found in protein powder for dogs (such as whey). Naturally rich in vitamins, minerals, and antioxidants, it contributes to healthy cholesterol levels, blood pressure, heart and immune function, and supports the body's natural regulation of the glandular and nervous systems.
Pumpkin Seed Powder
A nutrient dense superfood and natural source of antioxidants, carotenoids, fibre, and omega-3 fatty acids. Pumpkin seeds provide essential nutrients to support digestive health, urinary tract function, and immune health, while also helping to maintain healthy skin and coat. Their antioxidant profile plays a role in neutralising free radicals and supporting the body's natural defences, making them a valuable addition to any dog weight gain supplement.
Rolled Oat Flour
A gluten-free, slow releasing carbohydrate that offers fibre, B vitamins, and minerals. Rolled oats are known for their calming properties, often used in herbal practices as a nervine to help support mental and physical relaxation. They also assist nutrient absorption and contribute to balanced energy delivery, making them a smart companion in any weight gainer for dogs looking to build condition sustainably.
Fish Collagen and oil
A rich source of Omega 3, 6, and 9 fatty acids, fish collagen supports joint lubrication, gut function, brain health, and optimal skin and coat condition. As a natural joint care ingredient, it also nourishes connective tissues, helping maintain physical performance and vitality.
L-Taurine
A sulphur rich amino acid essential for healthy tissue function, bile production, and cardiovascular support. L-taurine plays a key role in maintaining the health of the urinary tract, eyes, and nervous system. When included in a dog weight gain supplement, it supports optimal nutrient utilisation and metabolic performance, making it a smart addition to nutritional regimes focused on weight gain for dogs and overall vitality.
L-Glutamine
A key amino acid and essential part of a dog's daily nutrition, L-glutamine is a powerful nutritional ally that supports optimal gut health, which in turn helps maintain a strong immune system. It plays a vital role in preserving the integrity of the gastrointestinal lining, aiding digestion and promoting effective nutrient absorption.
Glucosamine Sulphate
A vital structural compound that supports and maintains healthy cartilage within joints, an essential foundation for dogs building muscle mass. By contributing to joint resilience and a balanced inflammatory response, glucosamine plays a key role in the overall effectiveness of any dog weight gain supplement, helping to keep active, underweight, or working dogs moving comfortably as they develop strength.
“ProDog's supplements align perfectly with my holistic approach to veterinary care, emphasizing the critical role nutrition plays in pet health.
Their expertly formulated products, created by leading canine nutritionists, offer a straightforward solution for pet parents eager to enhance their dogs' diets with scientifically-backed, superior nutrition. This resonates with my commitment to guiding pet parents towards practices that foster their pets' health and vitality. By incorporating ProDog's supplements into a holistic health regimen, pet parents can confidently support their dogs' well-being, ensuring they receive the essential nutrients needed for a thriving, joyful life.”
(BVSc, GDVCHM, CVMA)
Our Customers Muscle+
Im so pleased with this purchase, my dog is doing amazing on it. He's getting HENCH!
Martine Evans
Excellent product that has worked well on my gsd that had problems with weight.
William Fleming
Muscle Plus has my boy Rocky looking amazing. He has really bulked out. I sprinkle it on his food. Started seeing improvements within 3 weeks.
Georgia Smith
Very good product does exactly what it says . My frenchie has gained weight and more muscle definition. He was 7kg but now 9.7kg within a month
Joely O'Neill
For anyone doubting the value or results of this product, don’t. I have a non-working Labrador pup who has been on this supplement for a month or so now. He’s gained over 15kg in that time, from 12kg to 25kg in under 6 weeks. He was struggling with his weight and condition when he first came to me, he’s thriving now and I’ve noticed and great increase in his strength since using this supplement.
S.L Bennett
Im so pleased with this purchase, my dog is doing amazing on it. He's getting HENCH!
Martine Evans
Excellent product that has worked well on my gsd that had problems with weight.
William Fleming
Muscle Plus has my boy Rocky looking amazing. He has really bulked out. I sprinkle it on his food. Started seeing improvements within 3 weeks.
Georgia Smith
Very good product does exactly what it says . My frenchie has gained weight and more muscle definition. He was 7kg but now 9.7kg within a month
Joely O'Neill
For anyone doubting the value or results of this product, don’t. I have a non-working Labrador pup who has been on this supplement for a month or so now. He’s gained over 15kg in that time, from 12kg to 25kg in under 6 weeks. He was struggling with his weight and condition when he first came to me, he’s thriving now and I’ve noticed and great increase in his strength since using this supplement.
S.L Bennett
Discover the principles that make our supplements unparalleled.
Muscle+ Feeding Guide
Up to 15kg = 1 scoop per day
Over 15kg = 2 scoops per day
Important Information
- Not a medicinal product
- For puppies under the age of 24 weeks, pregnant dogs or dogs on medication, please seek veterinary advice before use
- For dog consumption only
- Keep out of reach of children and other animals
- In case of accidental overfeeding, contact your local vet immediately
Guidance For First Time Users
We recommend introducing Muscle+ gradually and building up to the recommended serving:
- Start with ¼ of the recommended serving for 3–4 days.
- Increase to ½ serving for 3–4 days.
- Increase by ¼ serving every 3–4 days until you reach the full recommended serving for your dog’s weight.
Adding ProDog Muscle+ Supplement Powder to Wet Dog Food
- Add your usual amount of wet or raw food to your dog’s bowl.
- Sprinkle in the recommended serving of Muscle+ dog weight gain supplement.
- If combining with other ProDog dog vitamin supplements, add them now.
- Mix well until the powder is fully blended.
- Serve and let them enjoy.
Adding ProDog Muscle+ Supplement Powder to Dry Dog Food
- Place the dry food into your dog’s bowl.
- Add the correct serving of Muscle + protein powder for dogs.
- Add a splash of cold water or bone broth
- Stir until the powder is fully incorporated.
- Feed as usual.
Active Ingredients List
Each 5 gram scoop (1 serving) contains:
Tri-protein blend
Pumpkin seed powder
Rolled oat flour
Fish collagen & oil
L-Taurine
L-Glutamine
Glucosamine sulphate
FAQs
Can Muscle+ be used with other ProDog supplements?
Yes. Muscle + can be safely used in combination with other ProDog products, such as:
FLEXX joint supplement for dogs
REVIVE energy support and recovery supplement for dogs
PROTECT itchy dog supplement
DIGEST dog gut health supplement
SHINE dog skin and coat supplement
REPEL natural tick, flea and worm repellent
And our full spectrum immune supporting COLOSTRUM for dogs.
Why does the powder colour vary between packets of the same supplement?
Natural variation is expected in supplements that don’t contain artificial fillers. Factors such as harvest time, weather, soil, and ingredient combinations all influence colour. This is especially true for plant based ingredients like hemp, which can range from brown to green, depending on the batch.
Should I choose ProDog Muscle + or ProDog Perform?
Both Muscle+ and Perform are premium protein based supplements designed to support canine strength and condition, but they serve different goals.
Muscle+ is a dog weight gain supplement focused on helping underweight or under-muscled dogs gain healthy weight and build muscle mass. With a powerful 76% quality protein for dogs, zero fillers, and nutrient dense ingredients, it’s ideal for dogs recovering from illness, rescues, seniors, or any breed that needs additional support to bulk up or maintain ideal weight.
Perform, as the name suggests, is a performance supplement for dogs. It’s created to support peak athletic ability. With 52% protein, it promotes lean muscle development and healthy weight management for active, working, or sporting dogs. It’s ideal for dogs who already have good condition and are aiming to maintain or improve their performance, rather than gain size.
Important: Muscle+ and Perform should not be used together. Select the option that best suits your dog’s individual needs. Not sure which is right? Our expert nutrition team is here to help—please contact us for personalised advice.
What's the best dog food for weight gain?
The best dog food for weight gain is rich in protein, highly digestible, and made from fresh, natural ingredients. Raw dog food is an excellent choice. However, even a premium diet sometimes needs a nutritional boost, especially for dogs recovering from illness, underweight rescues, or those with naturally fast metabolisms. That’s where a dog weight gainer like ProDog Muscle+ makes a real difference.
Sprinkled over any bowl—including raw, dry, or home-prepared meals—Muscle+ delivers clean, bioavailable protein for dogs with 76% per scoop. It’s a simple and effective way to support healthy weight gain for dogs of all breeds.
Learn more in our full guide to healthy weight gain for dogs.
How to build Muscle in dogs naturally?
If you’re wondering how to build Muscle on a dog naturally, the key is a combination of the right nutrition and consistent physical activity. A fresh, species-appropriate diet, such as raw dog food, provides the foundational fuel —rich in amino acids and healthy fats —to support lean muscle development.
To take results further, adding a targeted dog muscle builder like ProDog Muscle+ can help. With 76% quality protein per scoop and zero fillers, this protein powder for dogs supports muscle gain through nutrient-dense, natural ingredients such as hemp, pea, and kelp.
Pair this with strength-building activities like resistance walking, uphill hiking, and controlled play to gradually and safely increase muscle mass. Whether your dog is underweight, recovering, or active and athletic, a consistent, nutrition-led approach is the smartest way to bulk up your dog naturally.
Need help creating a tailored weight gain plan for your dog? Contact our expert canine nutrition team for free, personalised advice. We’re here to support you and your dog every step of the way.
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