Protexin Pro-Fibre for Dogs, High-Fibre Digestive Supplement with Prebiotics & Postbiotics, Fibre for Dogs to Support Gut Hea

Overview

Pro-Fibre is the daily counterpart to Protexin's better-known upset-stomach paste: meat-free pellets you sprinkle on food to support normal digestion, firmer stools and healthier anal glands. With more than 8,700 reviews at 4.6 it has one of the largest and most consistent evidence bases of any dog digestive supplement sold in the UK, and at around £14 it is sensibly priced for daily use.

What it does

Pro-Fibre works mainly through fibre. High-quality dietary fibres bulk and firm the stool, which supports more comfortable digestion and, importantly for a lot of buyers, helps the anal glands empty naturally as they should. Alongside the fibre sit prebiotics, postbiotics and the well-established probiotic Enterococcus faecium to help maintain a healthy balance of gut bacteria.

The anal gland angle is worth spelling out, because it is why many owners end up here. Soft stools are a common contributor to glands that do not empty properly, which leads to the scooting and discomfort that prompts a vet visit. Firming the stool addresses the cause rather than the symptom.

Easy to give, which matters

It comes as pellets in a meat-free beef flavour that you add to or crumble over normal food, and it is suitable for both dogs and cats. Compliance is half the battle with any daily supplement, and a sprinkle-on pellet is far easier to sustain than a tablet you have to hide in cheese every morning.

Start at the weight-based dose on the pack and give it consistently. Fibre supplements work gradually: allow a couple of weeks before judging the effect on stool consistency.

Pro-Fibre or Pro-Kolin Advanced?

Straightforward: Pro-Fibre is the daily maintenance product, Pro-Kolin Advanced is the short-term paste for an acute upset. If your dog has ongoing soft stools or recurring anal gland trouble, Pro-Fibre is the one to be giving every day. If your dog has a sudden bout of diarrhoea, that is a Pro-Kolin situation.

Owners of dogs with persistent gland problems often use Pro-Fibre long term on veterinary advice, which is exactly what it is designed for.

Is it worth it? Our verdict

This is one of the easiest recommendations in the category. The evidence base is unusually large and consistent for a pet supplement, the price is reasonable for daily use, the format is genuinely easy, and it targets a specific, common problem rather than making vague gut-health claims.

The usual caveat applies: it is a complementary feed, not a medicine. Persistent digestive problems, blood, pain or repeated gland issues need a vet, who may well recommend this alongside proper investigation.

Key features, as the manufacturer lists them

Taken from the product listing via Amazon's product API. These are the seller's claims, not our test results.

• HIGH-FIBRE DIGESTIVE SUPPORT: Pro-Fibre is a fibre-rich prebiotic and postbiotic supplement developed to encourage normal digestion, support the gut microbiome and help maintain stool consistency for cats and dogs.*
• EASY-TO-GIVE, PET-FRIENDLY PELLETS: Meat-free beef flavour makes feeding simple — add to, or crumble over, your pet’s normal food. Suitable for pets with meat allergies or sensitivities.*
• PROBIOTICS & PREBIOTICS FOR GUT BALANCE: Includes the proven probiotic Enterococcus faecium to help maintain beneficial gut bacteria, while added prebiotics feed and support their growth.*
• FIBRE FOR FIRM STOOLS & HEALTHY ANAL GLANDS: High-quality dietary fibres help bulk and firm stools, supporting more comfortable digestion and promoting natural anal gland emptying through healthy stool formation.*
• Retrieving data. Wait a few seconds and try to cut or copy again.*Source: Kynetec VetTrak, Nutraceuticals Market. Subsector definition - 'Supplement, Companion Animal, Large Animal and Equine - Gastro (by manufacturer)'. MAT to end of September 2025 (Value Sales).

Frequently asked questions

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