Best Cat Probiotic Supplements of 2026

"I've started using this probiotic for my cats, and their digestion and appetite have noticeably improved. Mixing it with their wet food is simple, and they actually seem to enjoy the flavor. Even my fussiest cat eats eagerly now, and it’s been a real help when dealing with appetite or stool issues."

"After just a few days with FortiFlora, my cats' digestion was visibly better and their stools became much more regular. What I appreciate most is that they like the taste and never hesitate to eat their food when this is added, making it a convenient and effective solution for us."

"We have a Ragdoll with a sensitive stomach, and these packets have made a big difference. She loves the taste and hasn’t had runny stools since we started using them. For Ragdoll owners with similar issues, I highly recommend it—even though it’s a bit pricey, it’s absolutely worth it."

"After trying other probiotics with little success, I found that this product worked almost magically for my older cat with GI lymphoma. His chronic loose stool and odor issues have significantly improved within a week, and he loves the taste. It's been a transformative change for his digestive health, and I'll keep using it as recommended by our vet."

"My kittens were struggling with diarrhea until I started adding this probiotic to their food. They're always eager to eat it, which tells me they enjoy the flavor. Their digestion improved noticeably within days without any constipation. Although it's a bit pricey, the results make it worth it for me."

"Whenever my cats have digestive upsets, I use this probiotic and it quickly firms up their stools. They don't seem to mind the taste when I mix it with wet food, and I feel it's worth the price for how well it works."

"I've noticed less offensive litter box smell since I started using this liquid probiotic for my picky cat. Mixing it with his food is simple, and even though he can be choosy, he doesn't mind it at all. The first bottle worked great, but a later batch was foamy and made my cat vomit, which was concerning. After getting a clear bottle again, things went back to normal. Customer service resolved my issue quickly with a credit. The product overall seems to help, though the dropper could be better."

"I was skeptical at first, but after adding this to my cats' food, their poops became noticeably more solid overnight. Even better, the cats don’t notice it at all, which is a relief since they can be finicky. The improvement in odor and consistency was almost immediate, and I plan to keep a bottle on hand from now on."

"This probiotic has made a huge difference for my cat’s stomach issues. He used to have bloody stools and lots of gas, but after starting this (and some new food), those problems have almost disappeared. If I forget to give it, the issues come back—so I know it’s working. Even my picky eater has no trouble with it in his food."

"I've noticed major improvements in my dogs' digestion since starting these probiotics. All four of my dogs enjoy the taste, and the soft chews make it super easy for them to eat. Adjusting the dose by weight is simple, and they’ve really helped with issues like constipation and straining, especially for my dog Daisy. I’m confident this product supports their overall health."

"My dog transitioned from puppy to adult food and these chews made a big difference. His stomach is less gassy, his skin less itchy, and his coat is much shinier. The chews are the perfect size for his small mouth, and he has no trouble eating or digesting them. Great quality and price for the results!"

"I have a very picky dog who usually refuses supplements, but this is the only probiotic he actually likes! It's a relief to finally find a product that he’ll eat without a fuss. Highly recommend for finicky pets."

"I appreciate the easy-to-use single-serve packets and the fact that my dog loves the chicken liver flavor. It’s been great for managing his digestive issues and I feel good knowing it contains no artificial additives."

"After my dog's surgery and new medications, I started using this probiotic based on positive feedback. No stomach problems so far, and my dog has no complaints about the taste. I’m happy with the results and ease of use."

"This product has been a real help for my yorkie’s constant itching. After a few days of adding a little to her food, I've seen noticeably less scratching and chewing. I’m glad to have found an option that works without needing prescriptions."

"After trying several remedies, I finally sprinkled this probiotic on my cat's food and, within a couple of days, his gastro issues completely disappeared. I only need a small amount each day, so a box lasts a long time. Highly recommend to other cat owners with similar problems."

"My senior cat had nausea and vomiting due to CKD, but this product made a real difference. She likes the taste, and her symptoms have noticeably improved. I also appreciate that my vet uses the same brand in their clinic."

"I bought this for my kitten who was on antibiotics, and it settled her stomach quickly. She actually enjoys the flavor, and now she's back to her usual energetic self and gaining weight appropriately. Glad my vet recommended it!"

"After trying so many things for my 15-year-old cat, nothing worked—until I gave her Blisso. Within just two days she was eating, moving more, and by Christmas, she was back to her old self: playful, cuddly, and healing rapidly. I'm amazed at how quickly this product turned things around for her. Her skin is almost healed and her hair is growing back. Truly grateful!"

"My cat has been dealing with kidney problems, vomiting, and diarrhea. I started adding Blisso to his food and saw improvement the very next day. This supplement has made a clear difference for us, and I would absolutely recommend it to others."

"My cat with kidney disease struggled with constipation and low energy. After using Blisso for about 10 days, her bowel movements became regular, vomiting stopped, and her appetite returned. She seems much more energetic now and I'm happy with the results!"

"I've tried different foods for my Shih Tzus because of their allergies. This is the first supplement that actually relieved their allergic reactions. I'm impressed with how well it works and will definitely buy it again."

"I purchased this for my ferret with digestive troubles, and to my surprise, she loves it straight from the dropper. Her diarrhea already seems to be improving. I especially appreciate the enzymes like papaya and pineapple for their digestive benefits. The best part is both my ferrets are happy to take it."

"My cats have responded great to this—one has stopped overgrooming and the other has gained weight. I highly recommend it for anyone looking to support their cats' health."

"My cats absolutely love these probiotic chews—even my picky eater took to them right away! After a couple of weeks, I noticed more regular stools and less straining, which is exactly what I was hoping for. Their coats also look shinier and softer, and I appreciate that the ingredients are focused on gut health without any strong odor. Overall, the container lasts a long time and feels like a great value compared to other brands I've tried."

"I have four cats and they all devour these treats. Since introducing them, I've noticed they seem healthier, eat better, and eliminate more easily. It's definitely become a staple in our routine."

"My kitty had severe diarrhea that even vet-prescribed pills couldn't resolve. Out of desperation, I tried these chews, and within five days her toilet visits had firmed up. Two weeks later, she's completely clear. Amazing results!"

"I started giving this multi-strain probiotic to my 11-year-old cat after other probiotics and vet medications failed. It took about a week, but I could see steady improvement in his stool. I just open the capsule and mix it in, and it works great! I feel so relieved and will definitely keep using it."

"My cat has a sensitive stomach, but this supplement has been a lifesaver for diarrhea and tummy troubles. I add just a little to her wet food and she eats it without any fuss. It's so easy to use, and her bowel movements are back to normal. I’m glad to have it on hand for emergencies!"

"I have two cats and both of them accept this probiotic easily—even though they usually react badly to new supplements. So far, they’ve had no stomach upset and the ingredients seem high quality. I’ll definitely be ordering this again."