10 Best Probiotics For Dogs 2026 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.

PetLab Co. Probiotics for Dogs is a popular choice for pet owners seeking to support their dog's digestive health and seasonal allergies. It contains 8 different strains of beneficial bacteria, offering good strain diversity to encourage a balanced gut environment. The presence of prebiotics like inulin and natural ingredients such as pumpkin helps enhance digestion and ease occasional diarrhea or constipation.

The soft chew format with a pork flavor makes it easy to give as a treat, which many dogs find appealing. Additionally, it is manufactured in the USA and NASC certified, ensuring quality and safety. The product is suitable for all dog breeds and life stages, making it versatile.

With over 50,000 reviews averaging 4.2 stars, many users report positive results within about three months. This probiotic is a reliable daily supplement to improve gut health and manage mild allergy symptoms, though those needing targeted or higher-strength probiotics might want to compare other options.

Zesty Paws Vet Strength Probiotics for Dogs offers a thoughtful blend of ingredients aimed at improving your dog's digestion and immune health. It contains the DE111 Bacillus subtilis strain, which is clinically studied and known to support gut function and immunity—this gives confidence that the probiotic effect is backed by science. The addition of digestive enzymes like Amylase, Protease, and Bromelain helps break down food better, which can be great for dogs with sensitive stomachs. The formula also includes fiber and natural ingredients like ginger to support bowel health and digestive motility.

While it provides a focused strain rather than a complex mix, this can be beneficial if you prefer a targeted approach. The chews are designed to be tasty, making it easier to give supplements regularly without a struggle. They come in a convenient 90-count pack suitable for all dog breeds.

This product is a good choice for dog owners looking to support their pet's digestive health with a vet-formulated and palatable option. However, if you want a probiotic with multiple strains or detailed potency information, you might want to compare with other products.