- Soluble and insoluble fibre blend to support healthy stool consistency and anal gland function
- Two probiotic strains: Lactobacillus acidophilus (2.5 billion CFU) and Enterococcus faecium (440 million CFU)
- Prebiotic MOS and beta-1,3/1,6-glucans to support a healthy gut microbiome and immune system
- Montmorillonite (medical-grade clay) to help bind toxins and firm stool during digestive upset
- L-Glutamine and zinc oxide to support intestinal wall integrity
- Highly palatable powder — simply scoop onto food
- Health Canada authorized Veterinary Health Product (NN.N7U8) — vegan and all-natural
Product Description
Fibre is one of the most overlooked tools in pet digestive health. Unlike probiotics alone, which replenish beneficial bacteria, dietary fibre works mechanically and biochemically — bulking stool, feeding good bacteria, slowing transit time when needed, and supporting the regular emptying of anal glands. For dogs and cats with chronic soft stools, anal gland problems, or an overall sensitive GI tract, fibre is often the missing piece.
Fibre Boost +GI by Grey Wolf Animal Health takes a comprehensive approach. Rather than relying on a single fibre source, it combines both soluble and insoluble fibre — including oat bran (Avena sativa) and psyllium — alongside two probiotic strains, prebiotic MOS, immune-supporting beta-glucans, montmorillonite clay, and targeted minerals. The result is a formula that addresses gut health from multiple angles simultaneously. Distributed in Canada by Grey Wolf Animal Health, Fibre Boost +GI is manufactured by Cf Pharma and authorized for sale by Health Canada as a Veterinary Health Product (NN.N7U8).
The fibre backbone of the formula does the heavy lifting. Oat bran (3,330 mg per scoop) provides a mix of soluble and insoluble fibre, with beta-glucans contributing to immune modulation in the gut lining. Psyllium (210 mg) is a well-established soluble fibre that absorbs water in the colon, forming a gel that normalizes stool consistency in both directions — firming loose stools and softening hard ones. Together, these fibres support the regular, well-formed stools that are essential for natural anal gland expression. Many anal gland issues in dogs trace back to chronically soft stool that never adequately presses on the glands during defecation.
Two probiotic strains provide meaningful microbial support. Lactobacillus acidophilus at 2.5 billion CFU and Enterococcus faecium DSM 10663/NCIMB 10415 at 440 million CFU work together to populate the gut with beneficial bacteria and support a balanced microbiome. This dual-strain approach is more robust than single-strain products. Prebiotic mannan oligosaccharides (MOS, 120 mg) feed these beneficial bacteria while also physically binding to pathogenic bacteria, and beta-1,3/1,6-glucans (100 mg) activate immune cells in the gut-associated lymphoid tissue (GALT).
Montmorillonite (420 mg) is a medical-grade clay used in veterinary medicine to adsorb bacterial toxins and help normalize stool during acute GI upset. L-Glutamine (30 mg) supports the integrity of the intestinal wall — the enterocytes (intestinal cells) rely on glutamine as their primary energy source, making it important for maintaining the gut barrier. Zinc oxide (30 mg) and selenium yeast (30 mg) round out the formula with mineral support for immune function and intestinal healing.
Fibre Boost +GI comes as a palatable powder that is simply scooped onto food, making daily administration straightforward for most pets.
Key Ingredients
| Ingredient |
Amount per Scoop |
What It Does |
| Avena sativa (Oat bran) |
3,330 mg |
Primary soluble and insoluble fibre source; supports stool consistency, gut motility, and anal gland health. |
| Montmorillonite |
420 mg |
Medical-grade clay that adsorbs bacterial toxins and helps firm stool during digestive upset. |
| Psyllium |
210 mg |
Soluble fibre that forms a gel in the colon to normalize stool — firming loose stools and softening hard ones. |
| Mannan oligosaccharides (MOS) |
120 mg |
Prebiotic that feeds beneficial bacteria and binds pathogenic bacteria to prevent gut wall attachment. |
| Beta-1,3/1,6-glucan |
100 mg |
Activates immune cells in the gut-associated lymphoid tissue (GALT) to support overall immune function. |
| Selenium yeast |
30 mg |
Trace mineral supporting immune function and tissue repair. |
| Zinc oxide |
30 mg |
Supports intestinal healing and immune function. |
| L-Glutamine |
30 mg |
Primary fuel for intestinal wall cells; supports gut barrier integrity. |
| Enterococcus faecium DSM 10663/NCIMB 10415 |
440 million CFU |
Well-studied probiotic strain that supports healthy gut flora and microbial balance. |
| Lactobacillus acidophilus |
2.5 billion CFU |
Beneficial lactic acid bacteria that populates the intestinal tract and supports a healthy microbiome. |
Directions for Use
Administer once daily by sprinkling onto food.
Consult your veterinarian for weight-specific dosing recommendations. Use the scoop provided.
Suitable for daily maintenance in pets with sensitive GI tracts, chronic soft stools, or recurring anal gland issues. Also effective during acute digestive episodes, dietary transitions, and post-antibiotic recovery.
Supplement Advisor's Note
Fibre Boost +GI stands out because it addresses a root cause that pure probiotic supplements miss entirely: inadequate dietary fibre. Soft, poorly formed stool is one of the most common drivers of anal gland problems in dogs — the glands rely on the physical pressure of a well-formed stool to express naturally. The combination of oat bran and psyllium provides both soluble and insoluble fibre to normalize stool consistency regardless of whether the pet tends toward loose or hard stools. The inclusion of L-Glutamine is a detail worth noting — intestinal enterocytes use glutamine as their primary energy source, so it directly supports the mucosal barrier that keeps bacteria and toxins from crossing into systemic circulation. For pets with recurring anal gland impactions, chronic soft stools, or post-antibiotic dysbiosis, this is a more complete intervention than a probiotic alone.
FAQ
Q: How is Fibre Boost +GI different from Pro Care+ GI? A: Pro Care+ GI is a synbiotic in sachet form focused primarily on probiotic and prebiotic support for acute digestive recovery and microbiome balance. Fibre Boost +GI is a broader daily supplement that adds soluble and insoluble dietary fibre (oat bran and psyllium), montmorillonite clay, L-Glutamine, zinc, and selenium — making it better suited for pets with chronic stool quality issues, anal gland problems, or long-term GI sensitivity. Both products complement each other and can be used together.
Q: Can Fibre Boost +GI help with anal gland problems? A: Yes — and this is one of its primary use cases. Anal gland issues in dogs are frequently caused by chronically soft stool that doesn't create enough pressure to naturally express the glands during defecation. The soluble and insoluble fibre in Fibre Boost +GI helps firm and bulk stool consistently, which supports natural anal gland emptying over time.
Q: How long before I see results? A: Stool consistency improvements are often noticeable within 5–7 days of starting daily supplementation. For anal gland support, allow 3–4 weeks of consistent daily use to assess full benefit, as the effect is cumulative.
Q: Is this safe for long-term daily use? A: Yes. Fibre Boost +GI is formulated for ongoing daily maintenance, particularly for pets prone to digestive sensitivity, soft stools, or anal gland issues. It is all-natural, vegan, and Health Canada authorized.
Q: My cat is a picky eater — will they accept a powder on their food? A: Fibre Boost +GI is described as highly palatable by the manufacturer. For especially particular cats, try starting with a smaller amount mixed thoroughly into wet food and gradually increasing to the full dose over several days.
