"An orange tabby cat sits behind three probiotic cat supplements—FortiFlora, Pet Honesty, and Pet Naturals—on a wooden floor in a softly lit room."

5 Probiotic Supplements That Keep Cats’ Tummies Happy

Why Cats Need Probiotics—Just Like Humans

Cats aren’t that different from us when it comes to gut health. A balanced microbiome helps them with digestion, immunity, and even mood. When the good bacteria in their digestive system get thrown off—by stress, antibiotics, dietary changes, or illness—your cat might show signs like bloating, diarrhea, constipation, or loss of appetite.

This is where probiotic supplements for cats come in. These supplements help restore gut balance and can improve not only digestion but also energy, coat health, and immune response. Just like we might take probiotics after a course of antibiotics or while traveling, cats can benefit in the same way.

If you're already stocking up on smart pet picks, check out our Amazon Prime subscription-worthy cat products or our roundup of cat mom essentials for 2025.


What to Look for in a Cat Probiotic

  • CFUs (Colony Forming Units): Look for at least 1 billion CFUs per serving for meaningful support. More CFUs = more active bacteria.
  • Multiple Strains: Different strains help with different digestive functions. A variety of strains ensures broader coverage.
  • Delivery Method: Choose what works for your cat—powders, chews, or capsules. Soft chews are great for picky eaters.
  • Additional Ingredients: Some probiotics include prebiotics (to feed good bacteria), lysine (for immune health), or omega-3s (for skin & coat).

Are They Lab-Tested? How to Check

Yes—many of the top cat probiotics are tested for purity, potency, and safety. Look for terms like “veterinarian-formulated,” “third-party tested,” or “GMP-certified manufacturing” on the label or Amazon product page. If it’s not mentioned there, you can often find more info on the brand’s official website or by reading the top reviews and Q&A sections.


Top Cat Probiotic Supplements on Amazon

Image Product Details Price Range Buy
Purina FortiFlora Cat Probiotic Purina Pro Plan FortiFlora Vet-trusted powder probiotic for cats with diarrhea or post-antibiotic care. Easy to mix into food. $30–$35 Buy Now →
VetriScience Cat Probiotic Chews VetriScience Probiotic Chews Soft chews with prebiotics and probiotics. Great for cats with sensitivities or chronic tummy issues. $20–$25 Buy Now →
Pet Naturals Probiotic Chews Pet Naturals Daily Probiotic Affordable, chicken-liver flavored chew for daily use. Tasty enough for picky cats. $10–$15 Buy Now →
Pet Ultimates Probiotic Powder Pet Ultimates Probiotics (Powder) High-potency powder with 20 strains and 5 billion CFUs. Odorless and easy to blend into food. $25–$30 Buy Now →
Pet Honesty Cat Probiotic Chews Pet Honesty Gut + Immune Health Dual-texture chews with probiotics, fiber, lysine, and omega-3s. Great for all-in-one gut + immune support. $20–$25 Buy Now →

Final Thoughts

Supporting your cat’s gut health can have a ripple effect on their entire wellbeing—from digestion and energy levels to coat quality and immune strength. Whether your cat struggles with regular tummy trouble or you simply want to support their system, these probiotic options are all highly rated by vets and cat owners alike.

And if you’re looking to upgrade the rest of your cat care routine, don’t miss our list of Amazon must-haves for cat moms.

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