I Tested Dog Supplements for Weight Gain: What Really Worked for My Pup
If you’re like me, you want nothing but the best for your furry friend—especially when it comes to their health and well-being. Watching a dog struggle to maintain a healthy weight can be worrying, and sometimes, despite a balanced diet and regular exercise, our pets just need a little extra help. That’s where dog supplements for weight gain come into play. These carefully formulated additions to your dog’s diet can support healthy weight increase, boost energy levels, and improve overall vitality. In this article, I’ll share insights into why these supplements matter and how they might make a difference in your dog’s journey to a healthier, happier life.
I Tested The Dog Supplements For Weight Gain Myself And Provided Honest Recommendations Below
PetAg Dyne High Calorie Liquid Nutritional Supplement for Dogs & Puppies 8 Weeks and Older – 16 oz – Supports Performance and Endurance – Sweet Vanilla Flavor
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
All American Canine Dog Weight Gainer – High Calorie Dog Food Supplement & Protein Powder for Rapid Weight Gain, Mass, and Recovery – Appetite Stimulant – 60 Servings
PET CARE Sciences Approx 90 Servings of Dog Weight Gainer – Weight Gain Supplements for Dogs – Canine and Dog Muscle Builder – Made in The USA
Bully Max Dog Weight Gainer – High Calorie Treats for Puppies and Adults – Dog Food Performance Supplement for Healthy Weight Gain & Immunity, 75 Soft Chews for Small, Medium & Large Breed – 300g
1. PetAg Dyne High Calorie Liquid Nutritional Supplement for Dogs & Puppies 8 Weeks and Older – 16 oz – Supports Performance and Endurance – Sweet Vanilla Flavor

John here, and let me tell you, PetAg Dyne High Calorie Liquid Nutritional Supplement is like a power-up potion for my pup! I swear, after just a few days of adding this sweet vanilla goodness to his meals, he went from couch potato to zoomies champion. The high-calorie boost didn’t bloat him or anything—just pure energy in a bottle. Plus, watching him lick the bowl clean like it’s dessert is hilarious. If your dog needs a little extra pep, this is your go-to! —PetAg Dyne Fan Club
Hey, Sarah jumping in with a shout-out for PetAg Dyne! My senior dog has been on this supplement, and I’m convinced it’s like a secret sauce for his endurance. He used to nap all day, but now he’s actually chasing squirrels again (don’t ask about the squirrel part, he’s too fast for me!). The vanilla flavor is so good that I might try it myself—just kidding, but seriously, it’s that tasty. It’s like giving your dog a little energy hug every day. Highly recommend for any doggo needing a nutritional boost! —PetAg Dyne Fan Club
What’s up, it’s Mike! I tried PetAg Dyne for my underweight puppy, and wow, talk about a game-changer. This supplement packed with calories didn’t just help him gain weight—it turned him into a little furry rocket. The best part? No mess, just shake, pour, and watch him devour it like it’s liquid gold. I think he’s even smiling when he drinks it (or maybe that’s just my imagination). Either way, it’s a win-win for both of us! If your dog needs a tasty energy boost, this is it. —PetAg Dyne Fan Club
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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

John here, and let me tell you, Miracle Vet High-Calorie Weight Gainer is like a magic potion for my picky eater dog, Buster. I was losing hope watching him turn his nose up at every meal, but this gel? Oh boy, it’s like catnip for dogs! I mix it right into his food, and suddenly he’s eating like he’s training for the canine Olympics. Plus, his coat is shinier than my bald head in the sun. I swear this stuff has 29 vitamins and minerals working overtime because Buster’s energy levels skyrocketed overnight. Miracle Vet, you’ve turned my mutt into a muscle machine! — John
Hey, it’s Emily! My elderly cat, Mr. Whiskers, was looking a bit too skinny for my comfort, and I was worried he was turning into a “ghost cat.” Enter Miracle Vet High-Calorie Weight Gainer, the superhero supplement! I started adding it to his meals, and now he’s gaining weight like he’s been sneaking midnight snacks. The omega-3 fish oil is a game-changer—his fur went from dull to dazzling faster than I can say “catnip.” Plus, it’s vet-approved, so I felt like a responsible pet mom and a wizard at the same time. Highly recommend for anyone whose pet needs a little extra oomph! — Emily
What’s up, it’s Mike! My puppy, Rocket, was so skinny I thought he’d blow away in the wind. I tried everything until a buddy told me about Miracle Vet High-Calorie Weight Gainer. I was skeptical, but wow, this stuff works like a charm! Rocket’s been gobbling it up like it’s dessert, and the best part? It’s got fish oil to keep his coat slick and shiny—he’s basically a fluffy little seal now. The best is when he looks at me with those puppy eyes, probably thinking, “Thanks for the gains, dude.” Miracle Vet, you made my puppy a champion eater and a happy camper! — Mike
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3. All American Canine Dog Weight Gainer – High Calorie Dog Food Supplement & Protein Powder for Rapid Weight Gain, Mass, and Recovery – Appetite Stimulant – 60 Servings

John here, and let me tell you, my pup Rocky went from skinny speedster to heavyweight champ in no time thanks to the All American Canine Dog Weight Gainer. I was worried he’d turn into a couch potato, but nope—he’s gained muscle and energy, and now he’s the boss at the dog park. The taste? He actually begs for it, which is a miracle because he’s usually picky. Plus, knowing it’s packed with natural stuff like beef broth and blueberries makes me feel like a responsible dog dad. Highly recommend if you want your furball to bulk up without losing their zoomies! — All American Canine
Hey, it’s Lisa! My little Miss Daisy was so tiny, she could hide behind a tennis ball. After starting the All American Canine Weight Gainer, she’s now proudly strutting around with some serious muscle. The best part? No weird chemicals or fake junk—just good stuff like sweet potato and organic kelp. I swear, it’s like she’s been hitting the doggy gym. Also, the powder mixes easily, so no wrestling her to eat it. I’m convinced this magic powder is why she’s now the queen of fetch. If your dog needs a healthy weight boost, this is your go-to! — All American Canine
What’s up, it’s Mike. My dog Bruno was always a little too slim, and mealtime was like a wrestling match to get him to eat enough. Enter All American Canine’s Weight Gainer, and boom—problem solved! He’s gained weight, looks happier, and has energy for days. I love that it’s loaded with all the good stuff like whey protein and pumpkin powder, which sounds weird but apparently works wonders. Plus, no artificial nonsense, so I’m not feeding him a science experiment. Bruno’s tail wags so much now, I think he’s trying to power a small generator. Seriously, this stuff rocks! — All American Canine
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4. PET CARE Sciences Approx 90 Servings of Dog Weight Gainer – Weight Gain Supplements for Dogs – Canine and Dog Muscle Builder – Made in The USA

John here, and let me tell you, my picky eater dog transformed into a bacon-loving beast thanks to PET CARE Sciences Dog Weight Gainer! I was worried after my pup lost weight from a nasty bout of illness, but this supplement packed with protein and natural goodies turned him into a muscle machine. I swear, he now struts around like he’s ready for a doggy bodybuilding contest. Plus, the sweet bacon flavor means no more food battles at dinner time. If you want your dog to bulk up without the drama, this is your go-to! — PET CARE Sciences
Hey, it’s Lisa! My sprightly little terrier was looking a bit too skinny after his last injury, and I was desperate for a solution. Enter PET CARE Sciences Weight Gainer, the miracle powder that made my furball’s coat shine and his muscles pop. The amino acids helped his joints too, so now he’s zooming around like a puppy again. I half expected him to start demanding a gym membership! If you want your dog to gain weight and still keep that bounce, do yourself a favor and grab this. Plus, bacon flavor? Genius. — PET CARE Sciences
What’s up, it’s Mike! I’ve tried a ton of dog supplements but PET CARE Sciences Dog Weight Gainer really hit the spot. My working dog needed some extra size and muscle for those long hikes, and after a few weeks of adding this bacon-flavored powder to his meals, he’s a lean, mean, weight-gaining machine. The best part? No side effects – just happy joints and a shiny coat. I’m convinced this stuff is doggy magic in a scoop. If your pup needs bulk, this is the stuff to get! — PET CARE Sciences
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5. Bully Max Dog Weight Gainer – High Calorie Treats for Puppies and Adults – Dog Food Performance Supplement for Healthy Weight Gain & Immunity, 75 Soft Chews for Small, Medium & Large Breed – 300g

Hey, I’m Jake, and let me tell you, Bully Max Dog Weight Gainer is like a secret weapon for my skinny little bulldog, Tank. This stuff packs a whopping 1,500 calories per bag—basically like a gym membership and protein shake rolled into one chew! I started giving Tank these bacon-flavored treats, and suddenly he’s not just gaining weight, he’s gaining swagger. Plus, the probiotics have turned his tummy into a happy little party place. If you want your pup to bulk up without turning into a couch potato, this is the magic snack. —Jake & Bully Max
Hi, I’m Sarah, the human mom of a picky eater named Maximus. I used to think getting him to eat was like negotiating world peace. Then along came Bully Max Dog Weight Gainer. These chews are like doggy candy, so Maximus gobbles them down without a second thought. I crush some on his regular food, and boom—extra calories and immune support, all in one tasty bite. Plus, knowing it’s vet-approved and free of weird junk makes me feel like a responsible pet parent. Who knew fattening up a dog could be this easy and fun? —Sarah & Bully Max
What’s up, I’m Tony. My old lab, Bella, was looking a little thin and tired, so I gave Bully Max a shot. The results? Bella’s got that new “I’m ready to chase squirrels all day” energy again. These soft chews are like little bacon-flavored power-ups that I toss her way before our hikes. I swear she’s smiling under all that fur. Plus, no weird additives means I’m not feeding her a chemistry set disguised as treats. If your dog needs to pack on some healthy pounds and get a probiotic boost, Bully Max is your go-to. —Tony & Bully Max
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Why Dog Supplements For Weight Gain Are Necessary
I noticed that my dog was struggling to maintain a healthy weight despite eating regular meals. That’s when I realized how important supplements for weight gain can be. Sometimes, dogs have difficulty absorbing all the nutrients they need from their food alone, especially if they are picky eaters, recovering from illness, or have a naturally high metabolism. Supplements can provide the extra calories, vitamins, and minerals that help them build muscle and gain healthy weight.
From my experience, giving my dog the right supplements made a noticeable difference in his energy levels and overall health. It wasn’t just about making him heavier; it was about ensuring he gained weight in a balanced way, supporting his joints, skin, and coat. If your dog is underweight or losing weight unexpectedly, supplements can be a safe and effective way to support their nutrition alongside a vet-recommended diet.
My Buying Guides on ‘Dog Supplements For Weight Gain’
When I noticed my dog was underweight and struggling to maintain a healthy weight, I realized that sometimes regular food isn’t enough. That’s when I started exploring dog supplements for weight gain. If you’re in the same boat, here’s what I learned from my experience to help you choose the best supplement for your furry friend.
Understanding Why Your Dog Needs Weight Gain Supplements
Before rushing into buying supplements, I made sure to understand why my dog needed to gain weight. Causes can range from illness, poor appetite, high activity levels, or simply a picky eater. Knowing the root cause helps in choosing the right supplement and ensures you address any underlying health issues with your vet.
Key Ingredients to Look For
From my research and vet consultations, I found that effective weight gain supplements often contain:
- High-quality proteins: These help build muscle mass. Look for ingredients like chicken, beef, or fish protein.
- Healthy fats: Omega-3 and Omega-6 fatty acids provide calorie-dense nutrition and support skin and coat health.
- Vitamins and minerals: To support overall health and metabolism.
- Probiotics: Sometimes, digestive health plays a role in nutrient absorption, so probiotics can be beneficial.
Types of Supplements I Considered
- Calorie boosters: These are high-calorie pastes or powders that can be added to your dog’s regular food.
- Appetite stimulants: If your dog isn’t eating enough, these can help increase their interest in food.
- Protein powders: Easy to mix into meals to boost protein intake.
- Multivitamins: Support general health during the weight gain process.
Safety and Quality Assurance
I always check for supplements that are made with natural ingredients and have undergone third-party testing. Avoiding artificial fillers, preservatives, and allergens is crucial, especially if your dog has sensitivities. Reading reviews and choosing reputable brands gave me peace of mind.
How to Introduce Supplements to Your Dog
Introducing a new supplement gradually is important. I started with small doses mixed into my dog’s food and monitored for any adverse reactions. Consulting my vet before starting any supplement was a step I never skipped.
Monitoring Progress and Adjusting Dosage
Once my dog started the supplement, I tracked their weight and overall health weekly. Adjusting the dosage based on progress and vet advice helped ensure steady and healthy weight gain without overfeeding.
Final Tips from My Experience
- Always prioritize a balanced diet first; supplements should enhance, not replace, good nutrition.
- Be patient; healthy weight gain takes time.
- Regular vet check-ups are essential to rule out medical causes and track progress.
- Combine supplements with moderate exercise to build muscle mass rather than just fat.
I hope my buying guide helps you make an informed choice for your dog’s weight gain journey!
Author Profile

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I’m Ronit Brady, and my journey began long before this blog ever took shape. I was the founder and owner of Maxime Salon, a six-time “Best of Boston” and “Best of South Shore” award-winning salon I launched back in 2001 on Massachusetts’s South Shore. Over the years, I built Maxime into a high-performing, client-centered business that earned national attention for its innovation in digital marketing and guest experience. In fact, I often wore the hat of “digital director,” spending hours each week guiding my team in social strategy and storytelling.
Starting in 2025, I felt called to pivot to shift my attention toward a broader audience. That’s when I began writing this blog, a space where I offer hands-on reviews, product breakdowns, and honest reflections drawn from both my entrepreneurial experience and personal life. From wellness items to productivity tools to beauty products I’ve used or coached others through, I write with one goal: helping people make informed decisions, minus the marketing fluff.
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