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Top 6 Fiber Supplements for Dogs in Canada (2025): Veterinarian-Recommended, Clinically-Informed Choices for Better Digestion, Stool Quality and Weight Control

Published on Thursday, August 21, 2025

Soluble and insoluble fiber supplements for dogs are formulated to regulate bowel movements, support consistent stool formation, and nourish beneficial gut bacteria. These products are useful across common concerns such as constipation, loose stools, weight management and long-term colon health. Canadian pet owners increasingly choose fiber supplements that combine clinically studied ingredients like psyllium, pumpkin, beet pulp and prebiotic inulin with clear dosing for different sizes and life stages. Market preferences in Canada emphasize veterinary endorsement, clean-label formulas, easy-to-dose formats (powders, chews, and liquid toppers), and sustainable packaging. Buyers also look for options that clearly state fiber type and amount per serving so they can match a product to their dog s specific issue, whether acute diarrhea, chronic constipation, or calorie control during weight loss.

Quick Menu

1. Soluble Fiber Supplements for Dogs

2. Insoluble Fiber Supplements for Dogs

3. Natural Food-Based Fiber Supplements for Dogs

4. Fiber Powder Supplements for Dogs

5. Fiber Chews for Dogs

6. Fiber Capsules and Tablets for Dogs

1
BEST SOLUBLE FIBER SUPPLEMENTS FOR DOGS

Glandex Anal Gland Support Powder

Glandex Anal Gland Support Powder

Glandex is a category leader for dogs needing targeted anal gland support, combining soluble-fiber ingredients with specific botanicals to promote firmer stools and natural gland expression. Its unique selling point versus broader digestive supplements is the focused formulation intended to reduce anal gland issues and potential vet interventions, which can represent a cost-saving technical advantage for dogs with chronic gland problems.

4.3
★★★★☆
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  • Supports anal glands

  • Firms stool naturally

  • Supports anal glands

  • Firms stool naturally

Review Summary

88%

"Glandex is widely rated effective for reducing scooting and need for frequent anal gland expression after consistent use for several weeks; some users caution it takes time and isn't an instant fix. Overall feedback is strongly positive for dogs with recurring gland issues."

  • Chicken-flavor lure

  • Fiber-focused powder formulated to promote firmer stools that aid natural anal gland expression.

  • Chicken-flavor lure

  • Fiber-focused powder formulated to promote firmer stools that aid natural anal gland expression.

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Glandex is a category leader for dogs needing targeted anal gland support, combining soluble-fiber ingredients with specific botanicals to promote firmer stools and natural gland expression. Its unique selling point versus broader digestive supplements is the focused formulation intended to reduce anal gland issues and potential vet interventions, which can represent a cost-saving technical advantage for dogs with chronic gland problems.

  • Supports anal glands

  • Firms stool naturally

  • Chicken-flavor lure

  • Fiber-focused powder formulated to promote firmer stools that aid natural anal gland expression.

  • Designed for daily use to reduce scooting and anal gland issues over time.

  • Supports anal glands

  • Firms stool naturally

  • Chicken-flavor lure

  • Fiber-focused powder formulated to promote firmer stools that aid natural anal gland expression.

  • Designed for daily use to reduce scooting and anal gland issues over time.

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$30-50 CAD

2
BEST INSOLUBLE FIBER SUPPLEMENTS FOR DOGS

Purina Pro Plan Veterinary Supplements FortiFlora

Purina Pro Plan Veterinary Supplements FortiFlora

A veterinary market leader known for a clinically studied probiotic (Enterococcus faecium) that many vets recommend to stabilize gut flora; FortiFlora’s strong clinical backing and wide availability make it the go-to probiotic pairing when adding insoluble fiber to a dog’s diet. Financially and technically, its single-purpose probiotic powder contrasts with blended formulas on this list by offering trusted, evidence-backed microbial support that is often combined with separate fiber sources for best results.

4.8
★★★★☆
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  • Vet-strength probiotics

  • Tasty sprinkle

  • Vet-strength probiotics

  • Tasty sprinkle

Review Summary

93%

"Widely recommended by vets and users, reviewers report consistent improvements in stool quality and appetite with regular use; seen as a reliable, veterinary-grade probiotic."

  • Confidence powder

  • Veterinary-formulated probiotic with guaranteed live cultures to promote intestinal microbial balance.

  • Confidence powder

  • Veterinary-formulated probiotic with guaranteed live cultures to promote intestinal microbial balance.

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A veterinary market leader known for a clinically studied probiotic (Enterococcus faecium) that many vets recommend to stabilize gut flora; FortiFlora’s strong clinical backing and wide availability make it the go-to probiotic pairing when adding insoluble fiber to a dog’s diet. Financially and technically, its single-purpose probiotic powder contrasts with blended formulas on this list by offering trusted, evidence-backed microbial support that is often combined with separate fiber sources for best results.

  • Vet-strength probiotics

  • Tasty sprinkle

  • Confidence powder

  • Veterinary-formulated probiotic with guaranteed live cultures to promote intestinal microbial balance.

  • Single-serve packets for convenient daily mixing with food and proven to reduce stool abnormalities.

  • Vet-strength probiotics

  • Tasty sprinkle

  • Confidence powder

  • Veterinary-formulated probiotic with guaranteed live cultures to promote intestinal microbial balance.

  • Single-serve packets for convenient daily mixing with food and proven to reduce stool abnormalities.

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$50-75 CAD

3
BEST NATURAL FOOD-BASED FIBER SUPPLEMENTS FOR DOGS

Fruitables Pumpkin SuperBlend Digestive Supplement

Fruitables

Fruitables Pumpkin SuperBlend takes a food-first approach, using pumpkin and other natural fibers to gently support stool quality and regularity, making it an affordable entry point for owners seeking a natural fiber supplement for dogs. Compared with enzyme- or whole-food-forward competitors on this list, Fruitables stands out for its palatable, pumpkin-focused formula and lower price, which makes it ideal for routine, short-term digestive support in dogs on a natural-food feeding plan.

4.6
★★★★☆
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  • Pumpkin-powered relief

  • Sweet-potato boost

  • Pumpkin-powered relief

  • Sweet-potato boost

Review Summary

92%

"Users consistently report it firms and normalizes stools quickly, is easy to mix and palatable for most dogs; a few note a messy texture or limited effect in severe cases."

  • Sprinkle-and-go delight

  • Pumpkin-centered formula supplying soluble fiber to support regular bowel movements.

  • Sprinkle-and-go delight

  • Pumpkin-centered formula supplying soluble fiber to support regular bowel movements.

Increased Safety & Security

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Fruitables Pumpkin SuperBlend takes a food-first approach, using pumpkin and other natural fibers to gently support stool quality and regularity, making it an affordable entry point for owners seeking a natural fiber supplement for dogs. Compared with enzyme- or whole-food-forward competitors on this list, Fruitables stands out for its palatable, pumpkin-focused formula and lower price, which makes it ideal for routine, short-term digestive support in dogs on a natural-food feeding plan.

  • Pumpkin-powered relief

  • Sweet-potato boost

  • Sprinkle-and-go delight

  • Pumpkin-centered formula supplying soluble fiber to support regular bowel movements.

  • Includes additional natural fiber sources such as chia and flax for gut health.

  • Pumpkin-powered relief

  • Sweet-potato boost

  • Sprinkle-and-go delight

  • Pumpkin-centered formula supplying soluble fiber to support regular bowel movements.

  • Includes additional natural fiber sources such as chia and flax for gut health.

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$10-20 CAD

4
BEST FIBER POWDER SUPPLEMENTS FOR DOGS

Bernie's Perfect Poop Digestion Support

Bernie's Perfect Poop Digestion Support

Bernie's Perfect Poop focuses on natural ingredients (pumpkin, fiber and probiotics) to produce reliable stool consistency and digestive comfort, marketed with subscription and value-pack options that lower ongoing cost. It earns its place by balancing ingredient transparency and affordability, making it a strong mid-market choice for owners who want dependable fiber support without the higher price of specialized clinical blends.

4.3
★★★★☆
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  • Perfect poop

  • Enzyme boost

  • Perfect poop

  • Enzyme boost

Review Summary

85%

"Bernie's Perfect Poop is frequently credited with producing more consistent, firmer stools and easing occasional digestive upsets; many owners report visible improvement after regular use. A few users say it didn’t help their pet or that the taste can be off-putting for picky eaters."

  • Tail-wagging wink

  • Formulated to improve stool quality and regularity using natural fiber sources

  • Tail-wagging wink

  • Formulated to improve stool quality and regularity using natural fiber sources

Time-Saving Convenience

Increased Safety & Security

Bernie's Perfect Poop focuses on natural ingredients (pumpkin, fiber and probiotics) to produce reliable stool consistency and digestive comfort, marketed with subscription and value-pack options that lower ongoing cost. It earns its place by balancing ingredient transparency and affordability, making it a strong mid-market choice for owners who want dependable fiber support without the higher price of specialized clinical blends.

  • Perfect poop

  • Enzyme boost

  • Tail-wagging wink

  • Formulated to improve stool quality and regularity using natural fiber sources

  • Includes gut-supporting ingredients to promote healthy digestion

  • Perfect poop

  • Enzyme boost

  • Tail-wagging wink

  • Formulated to improve stool quality and regularity using natural fiber sources

  • Includes gut-supporting ingredients to promote healthy digestion

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$20-35 CAD

5
BEST FIBER CHEWS FOR DOGS

VetriScience Laboratories Digestive Support Pro Fiber

VetriScience Laboratories Digestive Support Pro Fiber

VetriScience positions as best-in-class for targeted fiber support thanks to a veterinarian-formulated fiber blend and precise dosing that emphasizes clinical efficacy over flash-in-the-pan palatability. It is technically advantaged for cases where controlled fiber intake and consistent results are required, and while typically pricier than consumer-focused brands like Zesty Paws, it offers a more specialist, vet-friendly profile for long-term digestive management.

4.6
★★★★☆
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  • Veterinary strength

  • Fiber-rich formula

  • Veterinary strength

  • Fiber-rich formula

Review Summary

90%

"VetriScience’s Digestive Support Pro Fiber is frequently praised for reliably improving stool quality and easing digestive upset, with many owners valuing the vet-formulated ingredient profile; a small number note limited benefit for severe cases."

  • Vet-approved high-five

  • Veterinarian-developed formula combining probiotics with soluble and insoluble fiber for balanced digestion.

  • Vet-approved high-five

  • Veterinarian-developed formula combining probiotics with soluble and insoluble fiber for balanced digestion.

Increased Safety & Security

Time-Saving Convenience

VetriScience positions as best-in-class for targeted fiber support thanks to a veterinarian-formulated fiber blend and precise dosing that emphasizes clinical efficacy over flash-in-the-pan palatability. It is technically advantaged for cases where controlled fiber intake and consistent results are required, and while typically pricier than consumer-focused brands like Zesty Paws, it offers a more specialist, vet-friendly profile for long-term digestive management.

  • Veterinary strength

  • Fiber-rich formula

  • Vet-approved high-five

  • Veterinarian-developed formula combining probiotics with soluble and insoluble fiber for balanced digestion.

  • Fiber blend helps bulk stools and support regularity in dogs with sensitive GI tracts.

  • Veterinary strength

  • Fiber-rich formula

  • Vet-approved high-five

  • Veterinarian-developed formula combining probiotics with soluble and insoluble fiber for balanced digestion.

  • Fiber blend helps bulk stools and support regularity in dogs with sensitive GI tracts.

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$25-45 CAD

6
BEST FIBER CAPSULES AND TABLETS FOR DOGS

Zesty Paws Probiotic Bites with Natural Digestive Enzymes

Zesty Paws

Zesty Paws Probiotic Bites with Natural Digestive Enzymes are a mainstream, flavor-forward choice that balance palatability, broad retail availability, and solid probiotic/enzyme support for routine digestive health. Compared to PetVitalityPRO their marketing and flavor range give them an edge in owner acceptance, while technically they are similar in function — neither is a dedicated fiber tablet, but both serve maintenance roles that can complement fiber-based strategies.

4.5
★★★★☆
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  • Soft probiotic bites

  • Digestive enzyme blend

  • Soft probiotic bites

  • Digestive enzyme blend

Review Summary

86%

"Zesty Paws Probiotic Bites are widely liked for improving stool quality and digestion, and most dogs accept the soft chews, though a small number of users experienced no change."

  • Zesty berry pop

  • Bite-sized chews combining probiotics with digestive enzymes for daily gut support

  • Zesty berry pop

  • Bite-sized chews combining probiotics with digestive enzymes for daily gut support

Recreational Enjoyment

Increased Safety & Security

Time-Saving Convenience

Zesty Paws Probiotic Bites with Natural Digestive Enzymes are a mainstream, flavor-forward choice that balance palatability, broad retail availability, and solid probiotic/enzyme support for routine digestive health. Compared to PetVitalityPRO their marketing and flavor range give them an edge in owner acceptance, while technically they are similar in function — neither is a dedicated fiber tablet, but both serve maintenance roles that can complement fiber-based strategies.

  • Soft probiotic bites

  • Digestive enzyme blend

  • Zesty berry pop

  • Bite-sized chews combining probiotics with digestive enzymes for daily gut support

  • Formulated to help maintain stool quality and regularity

  • Soft probiotic bites

  • Digestive enzyme blend

  • Zesty berry pop

  • Bite-sized chews combining probiotics with digestive enzymes for daily gut support

  • Formulated to help maintain stool quality and regularity

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$20-40 CAD

Explore More
  • Soluble Fiber Supplements for Dogs
  • Insoluble Fiber Supplements for Dogs
  • Natural Food-Based Fiber Supplements for Dogs
  • Fiber Powder Supplements for Dogs
  • Fiber Chews for Dogs
  • Fiber Capsules and Tablets for Dogs

What the Research Says About Fiber for Dogs

Scientific and veterinary literature supports using targeted fiber sources to improve stool consistency, normalize transit time and support a healthy gut microbiome. Different fibers work in different ways: soluble fibers tend to absorb water and form a gel that improves stool firmness and feeds beneficial bacteria, while insoluble fibers add bulk and can speed intestinal transit. Clinical trials and veterinary case reports over recent years have demonstrated benefits for constipation relief, improved stool quality in chronic diarrhea, and enhanced satiety to assist weight-control plans when combined with calorie management.

Psyllium husk (a soluble, gel-forming fiber) has been shown in veterinary studies to reduce constipation and improve stool consistency when dosed appropriately for size.

Fermentable fibers such as inulin and fructooligosaccharides act as prebiotics, promoting growth of Bifidobacteria and other beneficial microbes that produce short-chain fatty acids linked to colon health.

Insoluble fibers like cellulose and some beet pulp fractions increase fecal bulk and can speed transit, useful for mild constipation or regularity.

Fiber can support weight management by increasing perceived fullness and lowering calorie density of meals when used as part of a supervised weight-loss plan.

Clinical outcomes depend on matching fiber type and dose to the problem; abrupt changes can worsen symptoms, so gradual introduction is typically recommended.

Many peer-reviewed veterinary nutrition reviews recommend combining fiber strategy with hydration, diet assessment and, where necessary, vet supervision for chronic or severe conditions.

Whether you need a short-term fix for constipation, a daily prebiotic to support gut health, or a fiber strategy to assist weight loss, the Canadian market now offers clear, veterinarian-endorsed options in multiple formats. We hope this guide helped you find a suitable fiber supplement for your dog. Use the search to refine by form, ingredient, breed size or condition to narrow results or expand your options.

Discover More
  • Soluble Fiber Supplements for Dogs
  • Insoluble Fiber Supplements for Dogs
  • Natural Food-Based Fiber Supplements for Dogs
  • Fiber Powder Supplements for Dogs
  • Fiber Chews for Dogs
  • Fiber Capsules and Tablets for Dogs

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