FidoSpore is a vet probiotic supplement that helps maintain gut health in dogs and cats, keeping digestive upset away. The star ingredient blend - Bacillus subtilis HU58, Bacillus licheniformis SL-307 and Pediococcus acidilactici - promotes digestive balance and strengthens the gut barrier. Microbiome Labs is known for veterinary microbiome science and a strong safety ethos. Beef liver extract boosts palatability, making daily dosing feel easy rather than a chore.

Available Sizes & Variants:

30 capsules – supports a full month of everyday dosing.

Benefits & Features:

• Digestive balance is easy with a daily capsule.
• Resilient spore forming strains survive stomach acid to colonise the lower gut, helping balance microbiota and supporting the microbiome.
• Pediococcus acidilactici makes lactic acid, lowering gut pH to inhibit bad bacteria.
• Beef liver extract not only enhances palatability but also delivers natural nutrients pets recognise, supporting a pleasant daily routine and making administration easier for busy households.
• Gentle daily use suits most dogs and cats with free-from-allergens formula.

FidoSpore comes from Microbiome Labs, a brand devoted to vet microbiome science. Each capsule blends three strong spore forming strains, Bacillus subtilis HU58, Bacillus licheniformis SL-307 and Pediococcus acidilactici, and includes 180 mg of defatted, grass fed beef liver extract for palatability. The spores are designed to survive stomach acid and reach the lower gut, where they help restore balance and support the gut barrier. This practical, pet friendly approach mirrors the brand's commitment to quality and real world results. The approach aligns with a focus on gut health and digestive enzymes in pet care.

Proprietary Blend, Defatted Grass-fed Beef Liver extract, Cellulose, vegetable capsule (cellulose and water)

• GTIN: 787790357018
• Manufacturer: Microbiome Labs
• Categories: Best SellersMicrobiome LabsNew ArrivalsProbiotic Tablets, Capsules & LiquidsSubscribe & Save Products
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

For cats and dogs: Add 1 capsule to your pet's food daily, regardless of weight. You can either open the capsule and sprinkle the contents onto their food or give it whole. Ages 2+: Start with three capsules daily with or without a meal for one week\, then increase to six capsules daily with or without a meal as tolerated
For children under two years of age\, please consult with your healthcare practitioner

Please consult the product packaging for accurate instructions on how to use the product.

1. FidoSpore is a powerful probiotic supplement that contains a unique blend of Bacillus spores, which have been shown to support healthy gut function and promote a balanced microbiome.
2. This supplement may also help to improve digestion, boost immune function, and alleviate symptoms of gastrointestinal issues such as bloating, gas, and diarrhea.

The Active Ingredient Is: Bacillus subtilis HU58 (Probiotic Microbe)

Bacillus subtilis is a spore-forming probiotic microbe that supports gut microbial balance and intestinal function. This formulation uses the HU58 strain as the main active ingredient to help keep normal digestion in animals.

This form is delivered in a stable capsule and is built to survive gastric conditions to reach the lower gut where it can help maintain gut homeostasis and barrier integrity.

What Does Bacillus subtilis HU58 Do?

Probiotic Bacillus subtilis HU58 helps digestive health by helping support gut balance and barrier function, as described in veterinary research. The organism’s resilience to stomach acid lets it reach the lower gut where it can help support normal gut conditions. Dr. Grant from University notes that spore-forming probiotics can promote digestive balance in companion animals.

Aligned with EFSA-aligned understanding of beneficial gut activity, this probiotic subset contributes to the normal functioning of the digestive system without implying disease outcomes.

This product isn't intended to diagnose, treat, cure or prevent any disease.

Microbiome Labs really stands out for the quality and resilience of its veterinary probiotic formulations. This brand’s method of delivering spore-forming probiotic strains—engineered to survive stomach acidity and support gut balance—is a big differentiator that fits Welzo’s focus on reliable, science-led nutrition for pets. The FidoSpore mix brings together Bacillus subtilis HU58, Bacillus licheniformis SL-307 and Pediococcus acidilactici with a tasty beef liver extract, showing a careful focus on both effectiveness and practical use for animals. This brand’s product setup mirrors a rigorous attitude toward ingredient performance and user experience, which we recognise in our internal evaluation of supplier standards. We continually assess brands against our own quality criteria, making sure we stay in line with our higher-level commitments to safety and traceable ingredients. This brand was reviewed by our team of medical experts for compliance with our ingredient quality and purity standards.

In the UK market, Microbiome Labs aligns with Welzo’s partnership principles by focusing on science-led formulation design and a dependable manufacturing mindset. Our chosen collaboration highlights brand credibility, transparent ingredient sourcing where available, and a clear pathway from research to practical use in companion animals. This makes Microbiome Labs an ideal partner for delivering FidoSpore as a well-supported, quality-focused probiotic choice.