10 Best Probiotics For Dogs 2025 in the United States

The Purina Pro Plan Veterinary Supplements FortiFlora Dog Probiotic Supplement is a popular choice among veterinarians for managing digestive issues in dogs. With a probiotic strain of Enterococcus Faecium, it has a CFU count of 8 CFU/g, which supports intestinal health and balance. This product is suitable for all life stages and breeds, making it a versatile option for dog owners.

The supplement is in powder form, flavored with liver, which is often well-received by dogs, making it easy to administer. It also includes additional ingredients like vitamins C and E, zinc, and beta-carotene, which contribute to health and immune support.

However, the lack of multiple probiotic strains may limit its effectiveness for some dogs needing a broader spectrum of gut flora support. Additionally, the packaging is convenient but might result in more waste compared to bulk options. It's a solid choice for dog owners looking for a probiotic supplement, especially those dealing with digestive health issues.

Zesty Paws Dog Allergy Relief Chews are designed to support your dog's immune system, digestive health, and help with itchy skin and ear allergies. One of the strong points is the blend of six probiotic strains, including Lactobacillus acidophilus, which helps maintain a balanced gut flora. This diversity in probiotic strains is beneficial for digestive support. The product combines probiotics with other immune-supporting ingredients like Colostrum and Astragalus Root, plus a unique yeast fermentate called EpiCor, known to aid immune function.

The chews come in a soft, salmon-flavored form, which many dogs find tasty and easy to chew. This makes daily dosing simpler and enjoyable for pets. Another advantage is the suggested dosing based on dog weight, allowing for customized supplementation. Dogs with sensitive stomachs or specific allergies might want to review the ingredient list carefully.

These chews serve as a good choice if you're looking for a multi-purpose probiotic supplement that also targets allergy-related symptoms and immune support. Consulting with your vet about specific needs is recommended.

Zesty Paws Solid Poop Support Bites are designed to help dogs with digestive upset and diarrhea by firming up stool and supporting gut health. These soft chews combine probiotics like Bacillus subtilis (DE111) and Bacillus coagulans with prebiotics such as Fructooligosaccharides (FOS), which work together to promote a healthy balance of gut bacteria and improve digestion. The addition of pumpkin seed and a unique fiber called M-FIBER (derived from ground Miscanthus grass) helps bulk the stool and regulate bowel movements naturally.

The product also includes enzymes like cellulase and papain to aid digestion further. While the probiotic strains are mainly limited to two Bacillus types, these are clinically studied and stable, benefiting shelf life and potency. The soft chew format is convenient and palatable for most dogs, though measuring exact doses might require attention. Packaging is compact and likely supports freshness.

This supplement is suitable for dog owners looking for a gentle, natural way to manage diarrhea and improve bowel health. Those seeking a wider variety of probiotic strains or higher CFU counts might want to explore other options.