SOFT CHEWS

3500+ Reviews

Advanced Muscle & Weight Support

Made with clinically proven ingredients

PETVI is made with clinically studied ingredients shown to promote healthy weight gain, lean muscle growth, and full-body strength—naturally and safely.

VET LOVED & APPROVED

"I’ve seen the best results with PETVI Muscle & Weight Support Chews."

DR. Meghan Klark

SOFT CHEWS

3500+ Reviews

Advanced Muscle & Weight Support

Developed by VETs and canine nutrition experts, PETVI Muscle & Weight Support helps dogs safely gain weight, build lean muscle, and restore energy, starting from the inside out.

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02 hrs, 15 mins

30 day moneyback guarantee

If you are not 100% satisfied, contact us and we’ll refund you, ZERO questions asked!

Benefits

Builds healthy weight & lean muscle

Vet-formulated & dog-parent approved

Formulated* in the USA with premium ingredients

Backed by science - fueled by love

Dosage and weight guide

✅ Consistency matters. Make it part of your dog’s daily routine to see real, lasting results.

🦴 For supplemental feeding only. Not a replacement for a balanced diet.
📅 Give with meals to support digestion and nutrient absorption.

Nutrition facts

Made with clinically

proven ingredients

PETVI is made with clinically studied ingredients shown to promote healthy weight gain, lean muscle growth, and full-body strength—naturally and safely.

VET LOVED & APPROVED

"I’ve seen the best results with PETVI Muscle & Weight Support Chews."

DR. Meghan Klark

3500+ Reviews

what people are saying

Customer Reviews

Based on 3852 reviews
92%
(3533)
3%
(132)
3%
(103)
1%
(57)
1%
(27)
B
Beatrice White
Definitely works.

So I didn't get this product to beef up my Pit Bull or Rottweiler. My Siberian Husky is only 5 years old and has suffered from a tear in her cranial cruciate ligament and the surgery is not only expensive but mixed results on success and a normal life, you're only half fixing it. She's been on pain meds, inflammation meds, we bought a pool for her to do water therapy, all these things gave her her mobility back which was great to finally not see her in pain however her whole back end was severely suffering from muscle atrophy, her appetite diminished due to her medicine. I tried more water therapy and short walks in hopes of rebuilding that muscle and no luck. Her back end didn't even look like it belonged to a Siberian Husky. I didn't know what to do and came across this product when searching if there was any medication or supplements to help muscle regeneration. I figured it couldn't hurt, the ingredients are safe. In just a couple of weeks I am noticing a difference in her thighs and hips with the little exercise she is able to tolerate. Her appetite is getting better, she's actually eating an entire meal again. Her energy is great, she plays again with toys and our other dogs. She isn't so depressed and sedentary anymore. Bully has begun to help me get my dog back. I will continue to buy it for her until at the very least her muscle mass seems to where it should be. If you have a dog with this issue definitely give it a shot because surgery or nothing what most vets tell you makes it seem so hopeless but it does not have to be. However if you ARE getting this just to tone your dog up I have no doubts it will work especially if you exercise them regularly since my dog is building muscle and size back with little activity.

C
Christine Pettit
Great for convalescing!!

I'm a Veterinary Technician. My beautiful best friend, my almost 14 year old female APBT, has been having a tough year, limping terribly from a decade old "healed" ACL injury. She has been losing a lot of muscle mass, making her also very weak and having difficulty getting up, staying up, and moving around in general. She was losing interest in eating. Her urinary incontinence that she's always had was getting worse than it had ever been. I really thought that was it for her. If I could not get her to eat, I couldn't let her take pain meds, but without pain meds, she had zero appetite and it was a vicious cycle.6 months ago, I decided to give this a shot. If this didn't help her, then I would make the awful decision to end her suffering. Even though I'm usually more careful about higher protein content with elderly pets, I figured we had nothing to lose by trying it. I'm so glad I did!!Within a day of twice daily dosing, she wanted to eat. Within a week, she was playing more than she'd played in weeks. I was able to take her for little walks again and she even gained some muscle back. I was able to resume giving her meds to help with pain and inflammation. An odd side effect has been that her life ling urinary incontinence has completely stopped on this. I do not understand! She has been on every med on the market and every homeopathic remedy available since she was 2 years old and while they would all initially work, they would stop working rather quickly. This may be similar and maybe it will stop working also but to be honest, I don't know that she'll live long enough for that to happen. It's been amazing not having to change her dog bedding several times a day and not constantly smelling dog urine.She took 2-3 months of this and then I stopped to see if she could go without it. She did really well and kept her appetite, so I could keep giving her pain meds, and she was acting fine, but she has been losing muscle mass again, struggling to keep her back feet under her, and she needs that muscle to do that. So I bought this again and after just 1-2wks, it's already bringing a little bit of muscle back.I'm going to keep her on this until her last day with me!I highly recommend this, especially after illness or injury. It does work! If it works for my old lady, I can only imagine what it would do for a healthy, young dog. I wish I had given this to her when she was younger after her injury. If she'd had more muscle back then, it would have meant less pressure on her joints/etc and it could have meant more quality elderly years now.

B
Beverly Ford
Helped my Gsd come into herself!

My girl here has always been on a high quality, raw supplemented diet. We stay busy, but something wasn't right. She is a big female but never bulked up the way I knew she could. After starting petvi, the middle photos you can really see how its helped so far. We arent even through the first bottle yet! I only give her one pill a day.If your dog is lacking a little something, I really reccomend trying this. Her energy levels are not higher but her stamina is so much better. I can not stop admiring my girl. Thanks pet vi!

R
Robert Boyer
Saved My Dogs Life!

So I got a new dog from someone.. he’s 4 years old. The owner did not disclose that he was sick. He’s a pit bull. When I got him he was constantly pooping blood, underweight, lack of energy and overall just.. sick. The rate he was going, I knew he was going to die. I tried different food but nothing worked and I didn’t have money for a vet so I did some research and purchased him a wormer, some digestive health chewables, and petvi pills. I have to force feed them to him because he doesn’t like the taste but now he’s doing better than ever!!! I saw a change in two days, TWO DAYS!!! He’s so big, strong, full of energy and healthy now! I get compliments all the time about how beautiful and muscular he is now. He poops normally. I can tell he’s so much more healthy and happy now. No blood in his poops at all. I’m so grateful for these pills and I know my dog is too. I give him two a day and I will make positive he will take two a day for the rest of his life. I love these pills!!!! Thank you so much petvi for saving my dog!!!!

G
Gary Thompson
Just a regular vitamin

I compared it to a regular vitamin from Walmart and it had the same ingredients with the same dosage.Save your money and buy one from Walmart way cheaper.

CLINICALLY SUPPORTED MUSCLE & WEIGHT GAIN

In a series of veterinary-backed studies, dogs supplemented with key nutrients found in PETVI, saw measurable improvements in body composition, energy, and strength.
L-Carnitine has been shown to increase lean muscle mass, while Omega-6 fatty acids help support caloric absorption and healthy weight gain, especially in underweight, senior, or recovering dogs

17%+

Increase in healthy weight in just 8 weeks*

Clinically Validated Ingredients

30+ Dogs Across Multi-Stage Trials

Noticeable Gains in Muscle & Weight

Proven in Placebo-Controlled Trials

17%+

Increase in healthy weight over the placebo in just 8 weeks*

*Based on clinical studies of individual ingredients, not the finished product.While studies suggest benefits, results may vary. This product is not intended to diagnose, treat, cure, or prevent any disease.

Powerful Ingredients, Proven by Science

LEUCINE

Builds lean muscle and sparks protein synthesis.

This essential amino acid activates muscle growth at the cellular level, helping your dog rebuild strength, especially after illness, aging, or weight loss.

L-CARNITINE

Turns fat into fuel while preserving muscle.

By transporting fatty acids into cells for energy, L-Carnitine supports steady weight gain and lean muscle retention—ideal for underweight or recovering dogs.

ARGININE

Improves circulation and fuels tissue repair.

This vital amino acid promotes healthy blood flow and supports collagen production, aiding muscle recovery and overall vitality.

GROWTH SUPPORT BLENDâ„¢

Strengthens bones, metabolism, and safe growth.

A synergistic mix of D3, Zinc, B-Vitamins, and Omegas that helps build sturdy bones, support enzymes, and fuel energy—all essential for healthy weight gain.

WHAT TO EXPECT IN THE FIRST 8 WEEKS

Prescription meds can work fast but often cause side effects.

PETVI chews naturally rebuild strength and weight, gently and safely.

SIGNS YOUR DOG NEEDS MUSCLE & WEIGHT SUPPORT

Your dog can’t say they’re struggling—but their body will show it...

Loved by pets, endorsed by vets

meet dr. Meghan klark

I’ve seen the best results with PETVI Muscle & Weight Support. It’s powered by a clinically studied blend of essential amino acids and nutrient-rich omegas that help dogs build healthy weight, energy, and strength naturally and effectively.

Frequently ASked Questions

How can PETVI help my dog?

PETVI supports healthy weight gain, muscle strength, energy, and recovery. It's ideal for underweight dogs, seniors losing muscle, dogs recovering from illness or surgery, and picky eaters who aren’t meeting their nutritional needs.

Where is PETVI made?

PETVI is proudly formulated in the USA and made in a GMP-certified & FDA-cleared facility using premium & human-grade ingredients.

How many chews should I give my dog?

PETVI is dosed by weight:

Below 22 lbs: 2 chews/day

22 to 66 lbs: 3 chews/day

Over 66 lbs: 4 chews/day
Always give with meals for best absorption. Consistency is key for results.

Can PETVI be used with other supplements or medications?

Yes, in most cases. However, if your dog is on any medication or other supplements, it's always best to check with your vet before combining products.

How long until I see results?

Most pet parents start seeing early improvements in appetite, energy, or weight within 2–4 weeks. Visible muscle gain and strength typically improve after consistent use for 6–8 weeks.

Do dogs like the taste?

We knew that there was no point in making something that helped gain weight this well if you couldn’t get your dog to eat them. What’s the point? Dogs love the taste of PETVI Chews! Each treat is flavored with pork broth, and our dogs can’t get enough of them!

How should I store the chews?

Store in a cool, dry place with the lid tightly sealed. No refrigeration needed.

When will I receive my order?

- For U.S residents, please allow 2-3 business days to process your order. We’ll send your tracking details the moment the order ships.

- You can expect to receive your package within 7 to 10 business days after your order has shipped, depending upon your location.

How do I track my order?

You can track your order by chatting with us on our website or by emailing us at support@petvi.co

Need help? Questions? Concerns?

do not hesitate to contact us!

100% Satisfaction Guaranteed

We stand behind our products. If you are not 100% satisfied, contact us and we’ll refund your purchase price, no questions asked.

Advanced Muscle & Weight Support

$34.99