VetriScience Extra Strength Gut Mega Probiotic & Prebiotic Health Easy-Open Capsules Digestive Supplement for Dogs & Cats, 120 count

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About This Item

Details

  • Helps maintain normal stool quality and supports overall digestive comfort for cats and dogs of all sizes.
  • Probiotics work best when given consistently, and these capsules make it easy to support your pet’s digestive health every day.
  • Multi‑strain probiotic and prebiotic formula contains beneficial probiotic strains plus prebiotics to help support gut flora, nutrient absorption, and immune health.
  • Formulated with veterinary expertise and backed by VetriScience’s commitment to quality, safety, and effectiveness.
  • Capsules can be given whole or opened and mixed with food for easy daily supplementation, so they’re great for sensitive stomachs.

Ingredient Information

Instructions

FAQ

Learn More About VetriScience From Our Team of Experts

Get Things Moving, Inside & Out 

VetriScience probiotic supplements give your pet daily support for GI comfort & function. These science-backed formulas are made with premium ingredients and trusted by vets everywhere to support gut health and improved digestion at every stage of life.

Advanced Formulas with Premium Ingredients

Probiotics

High CFUs of probiotics support the entire GI system.

Digestive Enzymes

Digestive enzymes like pepsin and papain help boost nutrient absorption during digestion.

Fiber

Added fiber from sources like Sunfiber and alfalfa helps firm up loose stools.

All-in-One Boost for Every Adventure

Multiple strength levels provide a perfect fit for dogs & cats of every breed, size, and age.

  • Promote total GI health
  • Build a healthy gut
  • Soothe sensitive stomachs
  • Support immunity & energy
  • Help maintain healthy weight
  • Support senior pet healt

No Fake Stuff. No Fillers. No Joke.

VetriScience health supplements use powerful levels of clinically supported ingredients and no fillers, hidden ingredients, or harmful preservatives. Carefully designed by veterinarians and nutrition experts with what pets need, and nothing they don't.

About VetriScience

For over 40 years, VetriScience has helped pets live a life without boundaries. Formulated by vets and recommended by professionals, VetriScience uses only pure, highly researched ingredients to produce products that are safe, effective, and delicious!

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Questions & Answers

35 Customer Questions


I understand dog's guts need different bacteria than human guts. Are the bacteria in this product specific for dogs?


how do you split the capsule for the feline dosage. are these like caplets?

Answer by ChewyMar 09, 2019
This supplement comes in sprinkle capsules that allow you to split the capsule in half with ease.

does this Vetri probiotic contain a prebiotic? I believe I read someplace that it did, but since I've been researching many of these products I've lost track of which do and which don't. Thanks

Answer by ChewyJul 18, 2019
This supplement contains both prebiotics and probiotics.

Does this require refrigeration?

Answer by ChewyMay 14, 2018
It's recommended to store these capsules in a cool, dry place at a temperature of 70 degrees Fahrenheit or below. Refrigeration after opening is suggested.

4.6
Rated 4.6 out of 5 stars
741 Ratings

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Ease of Use

86% Positive

Effectiveness

89% Positive

Ingredients

90% Positive

Long-Term Benefits

94% Positive

424 Customer Reviews



Rated 3 out of 5 stars
By Susan on May 26, 2025

not as effective as I'd like

I have 15 and 25 lb dogs and they often get loose or runny stools on their diet of rice/grain mixtures, spring greens and chicken or eggs. I've seen their stool

I have 15 and 25 lb dogs and they often get loose or runny stools on their diet of rice/grain mixtures, spring greens and chicken or eggs. I've seen their stool become more solid when I give them human probiotics but mine are expensive and not the same species as those in dogs'. So I've been looking for the list of probiotics that contain the species that are in dogs.. but just because they are listed doesn't mean they are actually in there and that they are alive and working. These seemed to help my dog get better stool texture and increase appetite for my dogs only sometimes and when I gave 2 to my 25 lb dog. So I would say for every 15 lbs, they need one capsule. Considering the dosage, these are expensive and they don't work as well as Herb Smith Microflora. I need to compare prices now for what I get with Herb Smith.

By Susan on May 26, 2025

Rated 5 out of 5 stars
By Dozer16 on Jun 27, 2017

This Probiotic is excellent

My dog has serious IBS and needed a good full spectrum Probiotic to help his stomach issues. This one works great along with Mercola Digestive Enzymes that I also

My dog has serious IBS and needed a good full spectrum Probiotic to help his stomach issues. This one works great along with Mercola Digestive Enzymes that I also get from Chewy's. This site is awesome and I get all my pet supplies from here. The customer service is great and their prices are the best online and cheaper than the vet office. Everything arrives within two day, three at the very most.

By Dozer16 on Jun 27, 2017

Rated 5 out of 5 stars
By Sharon on Jan 25, 2015

Helped my 12 year old dog!

Ronin, my standard Min Pin, has had tummy issues his entire life. As he's gotten older they have increased. I noticed a difference in his reflux, gas, etc.. within

Ronin, my standard Min Pin, has had tummy issues his entire life. As he's gotten older they have increased. I noticed a difference in his reflux, gas, etc.. within a day of using this product! There were times when he would even refuse to eat due to his stomach issues. Thankful I found it! With his size being under 40lbs it is also just one a day. I put it in a bit of peanut butter and he never notices!

By Sharon on Jan 25, 2015

Rated 5 out of 5 stars
By Annie on Feb 8, 2017

VetriScience Vetra-Mega Probiotic

I raise purebred show cats; most everyone knows that purebreds have very delicate digestive and immune systems. My kids are no exception. I have been running myself

I raise purebred show cats; most everyone knows that purebreds have very delicate digestive and immune systems. My kids are no exception. I have been running myself ragged trying to find a resolution to chronic diarrhea. My vet, of course, wants to do hundreds of dollars worth of tests. Usually, these tests result in no definitive answer. I tend to lean toward the holistic approach with my kids. Several weeks ago, I started my kids on diatomaceous earth, which gave me 'okay' results, but 'okay' results for me were not good enough. When I found this probiotic on Chewy, I knew I had found the rest of the equation. Whenever the Flora in the gut is changed, whether that be a good change or bad change, the digestion process changes. So in the beginning, during the first few days I was not surprised to see that diarrhea had returned. But after about a week of being on this probiotic, I was beginning to see a good change. My kids have been on this probiotic for about 2 weeks now, and scooping their boxes is always a pleasant surprise. The addition of this probiotic has changed cow patties into nice, perfect tootsie rolls. As a professional breeder, I highly recommend the addition of this probiotic to your furkids diet. Even if diarrhea is not an issue, this probiotic will strengthen their immune system, making them happier and healthier. And that's the true reward.

By Annie on Feb 8, 2017

Rated 5 out of 5 stars
By jo on Apr 18, 2016
Top 100 Contributor

Good probiotics

In my search for a good probiotic to give my dog, I decided on these, she has done very well with these in the treat form. A few months ago I looked every where

In my search for a good probiotic to give my dog, I decided on these, she has done very well with these in the treat form. A few months ago I looked every where and could not find the treat form, every place was out. I eventually did find some and ordered them a few days later I received a phone call saying they were out and they offered to send me a different kind that supposedly had the same ingredients. I received the new kind and started noticing some very loose stool. Aw oh, I should have checked the ingredients all was fine except they contained dairy, my dog does not do well with dairy. So I quickly ordered these and started mixing them in with a little canned food, things are almost back to normal. This is the second time I placed an order from that other place and the second time that I have waited for over a month for a refund of some sort this time because that other antibiotic was cheaper. I had to write customer service both times and ask about the $ owed to me. Just one more reason to always stick with chewy!

By jo on Apr 18, 2016
Top 100 Contributor

Rated 5 out of 5 stars
By LauraV on Jan 8, 2025
Top 1000 Contributor

Great probiotic for inflammatory bowel disease

I started giving this to my dog several years ago when he was diagnosed with inflammatory bowel disease. He has a very sensitive stomach and was constantly getting

I started giving this to my dog several years ago when he was diagnosed with inflammatory bowel disease. He has a very sensitive stomach and was constantly getting sick from various things I fed him. I like this probiotic because it has a bunch of different strains and has the highest amount of colony forming units than almost every other probiotic. After finding out and eliminating all the stuff that made him sick he's been doing great. It does make dogs a little gassy at first but it goes away. Definitely a good choice!

By LauraV on Jan 8, 2025
Top 1000 Contributor

Rated 5 out of 5 stars
By Blazer on Nov 4, 2023

Best Probiotic!

I can not stress my gratitude at how effective these probiotics are in hardening pets stools, because the last thing you want is an incontinent double rear amputee

I can not stress my gratitude at how effective these probiotics are in hardening pets stools, because the last thing you want is an incontinent double rear amputee cat dragging their back end through the house with anything less than hard poops.

By Blazer on Nov 4, 2023

Rated 4 out of 5 stars
By Emily on Nov 7, 2019

Her poop...looks better?

Not exactly something I planned on writing but it’s true. It’s also not why I bought the product. She’s always been regular and her poop has always been normal,

Not exactly something I planned on writing but it’s true. It’s also not why I bought the product. She’s always been regular and her poop has always been normal, except for the one time in puppyhood when she ate 13 fermented plums from under a plum tree and had the runs for days. It was almost comical. I don’t know how to describe what this has done to her poop except to say that it’s picture perfect magazine worthy poop because of this stuff. Anyway, I bought it as part of my “kitchen sink” plan for helping my golden retriever deal with an aggressive bout of seasonal allergies. Research has suggested that gut health in canines is tied to the immune system’s response to allergens and not just to food allergens. Healthy gut = less extreme response. These were affordable, had good reviews, and the company provides reasons for why they chose the bacteria species that they did. I have no way of knowing if this has impacted my dog’s allergies since it is one of many products I’m giving her. Do I care that I won’t know exactly what helped her seasonal allergies? Nope. I’m just glad she’s less itchy. Will I reorder? Maybe.

By Emily on Nov 7, 2019

Rated 5 out of 5 stars
By some1 on Sep 21, 2019

These Work So Well, I'm Amazed!!!

I bought these for my GSD, hoping it would help his severe chicken/egg allergy, and his constant runny poos. I also started giving some to our Chihuahua and old

I bought these for my GSD, hoping it would help his severe chicken/egg allergy, and his constant runny poos. I also started giving some to our Chihuahua and old cat. Within a week, the cat's white fur had become so much more white, it's almost bright enough to emit its own light. She is a long hair breed, and we had been having trouble with her hair falling out in clumps lately, and just making a huge hairy mess around the house. But now, she doesn't lose hair anymore! This is the first time in her life that we can pet her without having a hand full of fur afterwards. Her eyes are much brighter than they have been in the past 3 years, and she seems genuinely happier. I'm simply amazed, and feel guilty for not knowing she needed these sooner. The Chihuahua doesn't get this as often, but I can tell her fur is a little bit softer than usual with her minimal dosing. The German Shepherd mix took a little bit longer to see results, but he is a big boy, so that's fair. Because of his size/severity of issues, I started him on a double dose. It's been about a month now, and his movements are all solid (first time in almost 2 years), and he seems to have more energy. I have started giving him small treats that contain chicken, and he seems to be ok! I will still give these to him for a while longer before adding chicken to his meals, but I have high hopes with the progress we've made so far! He has been allergic to chicken/eggs his entire life, and often gets an upset tummy being around other dogs who have eaten chicken, so this product is a blessing! I just open the capsules over his food and blend it in so he doesn't think it's anything weird sitting on top. It took him a while to eat it willingly (he heard me call it medicine once, opps), but now he knows it's good stuff. I'm already showing it to all my friends so they can buy it for their own pets. I truly believe this is a product that every pet owner needs to buy, at least once in a while. If your pet is getting old, I recommend feeding them this every single day.

By some1 on Sep 21, 2019

Rated 5 out of 5 stars
By Pamela on Aug 31, 2017

No more throw-up

We purchased this when we noticed our 14 year old cat was having a hard time keeping food down. We also changed her food to a different protein, thinking she may

We purchased this when we noticed our 14 year old cat was having a hard time keeping food down. We also changed her food to a different protein, thinking she may have developed a food allergy. This cleared up her issues and we had stopped giving her the probiotic after some time. We noticed that she would still regurgitate either food or saliva, after eating, maybe 1-2 times a week, in small amounts. Fast-forward to this past week and she somehow got out of the house. She returned after being outside for two nights. The first time she ate, she threw up all of her food almost right away. We decided to start her back on this product. After giving it to her just one time, she kept her food down. We've continued to give it to her once daily. We've noticed that she is not throwing up at all, not even the occasional bits of saliva we would find at times. She will even wait for us to sprinkle this on her food before eating. She seems to like it.

By Pamela on Aug 31, 2017