Best Fiber Supplement For Dogs
Finding the right fiber supplement can make a significant difference in your dog’s digestive health, stool consistency, and overall comfort. Whether you’re dealing with occasional constipation, diarrhea, or anal gland issues, adding fiber to your dog’s diet can provide natural relief. We’ve researched the top fiber supplements available to help you choose the best option for your furry friend.
Our Top Picks at a Glance
- Best Overall: Vetnique Labs Glandex — Vet-recommended with pumpkin and fiber blend
- Best Value: Bernie’s Perfect Poop — Affordable daily digestive support
- Best Premium: Native Pet Pumpkin Powder — Pure organic pumpkin with maximum effectiveness
Quick Comparison
| Product | Key Ingredients | Form | Servings | Best For |
|---|---|---|---|---|
| Vetnique Labs Glandex | Pumpkin, Psyllium, Digestive Enzymes | Soft Chews | 90 | Anal gland support |
| Bernie’s Perfect Poop | Pumpkin, Prebiotics, Probiotics | Powder | 56 | Daily digestive health |
| Native Pet Pumpkin | 100% Organic Pumpkin | Powder | 60 | Pure natural fiber |
| Diggin’ Your Dog Firm Up | Pumpkin, Apple Pectin | Powder | Varies | Stool consistency |
| PetLab Pumpkin Fiber Blend | Pumpkin, Psyllium, Mushrooms | Powder | 60 | Comprehensive gut health |
| Vetoquinol Laxatone | Psyllium Husk Powder | Gel | Varies | Hairball and constipation |
| Zesty Paws Probiotic Bites | Pumpkin, Probiotics, Prebiotics | Soft Chews | 90 | Digestive support with probiotics |
1. Vetnique Labs Glandex — Best Overall
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Vetnique Labs Glandex stands out as the most comprehensive fiber supplement for dogs, specifically formulated to support anal gland health while improving overall digestive function.
This veterinarian-recommended formula combines pumpkin seed, psyllium husk, and digestive enzymes in a peanut butter-flavored soft chew that dogs love. The unique fiber blend helps create bulkier, firmer stools that naturally express anal glands during elimination. Made in the USA with quality ingredients, Glandex has become the go-to choice for veterinarians treating dogs with anal gland issues.
What We Like
- Veterinarian-formulated specifically for anal gland support
- Peanut butter flavor makes administration easy
- Contains both fiber and digestive enzymes for comprehensive support
- Noticeable improvements within weeks of consistent use
What Could Be Better
- Higher price point compared to plain pumpkin supplements
- Some dogs may need multiple chews daily depending on size
Bottom Line: If your dog struggles with anal gland issues or needs comprehensive digestive support, Glandex delivers results that justify the investment.
2. Bernie’s Perfect Poop — Best Value
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Bernie’s Perfect Poop offers an affordable daily digestive supplement that combines fiber, prebiotics, probiotics, and digestive enzymes.
This grass-fed whey protein-based powder includes pumpkin, Miscanthus grass fiber, and flaxseed to support healthy digestion and firm stools. The four-in-one formula provides comprehensive digestive support at a price point that makes daily use sustainable for most pet parents. Many users report improvements in stool consistency, reduced gas, and better overall digestive comfort within the first week of use.
What We Like
- Excellent value with multiple benefits in one supplement
- Contains prebiotics and probiotics for gut health
- Easy-to-mix powder works with any food
- Made in the USA with quality ingredients
What Could Be Better
- Some dogs may not enjoy the taste initially
- Requires daily administration for best results
Bottom Line: For comprehensive daily digestive support at an affordable price, Bernie’s Perfect Poop delivers excellent value.
3. Native Pet Pumpkin Powder — Best Premium
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Native Pet offers pure, organic pumpkin powder with no fillers or additives, providing maximum nutritional value from this natural fiber source.
This USDA-certified organic pumpkin powder contains nothing but dehydrated pumpkin, making it ideal for dogs with sensitivities or allergies. Pumpkin is rich in fiber, vitamins, and minerals that support digestive health, stool consistency, and overall wellness. The powder mixes easily into food or can be reconstituted with water to create a fresh pumpkin puree. Each serving provides substantial fiber content to help regulate digestion naturally.
What We Like
- 100% organic pumpkin with no additives
- Versatile use – mix with food or create puree
- Rich in vitamins A, C, and E
- Suitable for dogs with food sensitivities
What Could Be Better
- Higher cost per serving than combination products
- Lacks probiotics or digestive enzymes found in other supplements
Bottom Line: For pet parents seeking pure, organic fiber without additives, Native Pet Pumpkin Powder is worth the premium price.
4. Diggin’ Your Dog Firm Up — Best for Stool Consistency
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Firm Up combines pumpkin and apple pectin in a simple formula specifically designed to improve stool consistency.
This veterinarian-recommended powder contains only two ingredients: drum-dried pumpkin and apple pectin. The combination works synergistically to help firm up loose stools and normalize bowel movements. Many veterinarians recommend Firm Up as a first-line supplement for dogs with chronic diarrhea or inconsistent stool quality. The powder is easy to measure and mix, and most dogs readily accept the taste when added to their regular food.
What We Like
- Simple two-ingredient formula
- Highly effective for diarrhea and loose stools
- Veterinarian-recommended
- Made in the USA
What Could Be Better
- Limited to stool consistency issues
- Doesn’t include probiotics or enzymes
Bottom Line: If your primary concern is firming up loose stools, Diggin’ Your Dog Firm Up does one thing exceptionally well.
5. PetLab Pumpkin Fiber Blend — Best Comprehensive Formula
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PetLab Co. combines pumpkin, psyllium husk, apple pomace, and a tri-mushroom blend for comprehensive gut health support.
This veterinarian-formulated powder goes beyond basic fiber supplementation by including functional mushrooms and multiple fiber sources. The psyllium husk provides both soluble and insoluble fiber, while the mushroom blend supports immune function and overall wellness. The powder mixes easily with food and is designed for daily use to maintain optimal digestive health. Many users report improvements in stool consistency, reduced gas, and better overall digestive comfort.
What We Like
- Multiple fiber sources for comprehensive support
- Includes functional mushrooms for immune health
- Vet-reviewed and nutritionist-formulated
- Easy-to-mix powder form
What Could Be Better
- Higher price than single-ingredient options
- Some dogs may take time to adjust to the taste
Bottom Line: For dogs needing comprehensive digestive and immune support, PetLab’s formula justifies the premium price.
6. Vetoquinol Laxatone — Best for Constipation
- PREMIUM QUALITY: A combination of premium texture and granule size made with 100% bentonite clay for maximum clumping creates litter particles that are just the right size.
- LOW DUST: Ideal for cats and owners who suffer from allergies with a 99.9% dust-free and hypoallergenic litter formulation.
- HARD CLUMPING: Hard clumping medium grain clay helps prevent moisture from reaching the bottom of the tray and forms hard clumps that won't break down, making it easier to scoop.
- SUPERIOR ODOR CONTROL: Formulated for single or multi-cat households with natural ingredients to keep your home smelling clean and fresh between litter box cleanings.
- LOW TRACKING: A unique formulation of medium grain clay helps keep litter in the box where it belongs.
Laxatone provides psyllium husk in a palatable gel formula specifically designed to prevent and treat constipation.
This veterinarian-recommended gel combines psyllium husk powder with a tasty formula that most dogs accept readily. While often marketed for hairball control in cats, Laxatone works equally well for dogs struggling with constipation or hard stools. The gel form makes administration easy, and the psyllium husk helps draw water into the intestines to soften stools and promote regular bowel movements.
What We Like
- Highly palatable gel format
- Effective for constipation relief
- Easy to administer
- Quick results in most cases
What Could Be Better
- Primarily for constipation rather than general fiber needs
- Contains petroleum-based ingredients
Bottom Line: For dogs specifically struggling with constipation, Laxatone provides fast, effective relief in an easy-to-give format.
7. Zesty Paws Probiotic Bites — Best with Probiotics
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Zesty Paws combines pumpkin fiber with six strains of probiotics for comprehensive digestive and immune support.
These chicken-flavored soft chews include pumpkin, probiotics, prebiotics, and digestive enzymes in one convenient treat. The six probiotic strains support healthy gut flora, while the pumpkin provides fiber for stool consistency. The soft chew format makes administration easy, and most dogs view them as treats rather than medication. Many users report improvements in digestion, reduced gas, and firmer stools within the first few weeks of use.
What We Like
- Combines fiber with six probiotic strains
- Chicken flavor dogs love
- Includes digestive enzymes
- Convenient soft chew format
What Could Be Better
- May be excessive for dogs with simple fiber needs
- Higher cost than basic fiber supplements
Bottom Line: If you want to address both fiber and probiotic needs with one supplement, Zesty Paws delivers comprehensive support.
How to Choose the Best Fiber Supplement for Your Dog
Selecting the right fiber supplement depends on your dog’s specific needs, health conditions, and dietary preferences. Start by identifying the primary issue you’re addressing, whether it’s anal gland problems, constipation, diarrhea, or general digestive health. For anal gland support, look for supplements with pumpkin and psyllium that create bulkier stools. If your dog has chronic diarrhea, a simple pumpkin and apple pectin formula often works best.
Consider your dog’s size and the supplement format when making your choice. Soft chews work well for dogs who view them as treats, while powders offer more flexibility in dosing and can be easily mixed with food. Larger dogs may require multiple chews per day, making powder supplements more economical. Always check the ingredient list for potential allergens if your dog has food sensitivities.
Quality matters when choosing a fiber supplement. Look for products made in the USA with clear ingredient lists and no unnecessary fillers. Veterinarian-formulated or recommended products typically undergo more rigorous testing and quality control. Start with a lower dose than recommended and gradually increase to the full amount to prevent digestive upset during the transition period.
Pay attention to additional ingredients beyond fiber. Some supplements include probiotics for gut health, digestive enzymes for better nutrient absorption, or prebiotics to feed beneficial bacteria. These additions can provide extra benefits but also increase the cost. If your dog only needs basic fiber supplementation, a simple pumpkin powder may be more appropriate than a complex formula.
Monitor your dog’s response to the supplement over several weeks. Improvements in stool consistency should appear within a few days, but issues like anal gland problems may take several weeks to resolve. Keep track of changes in bowel movements, energy levels, and any digestive discomfort. If you don’t see improvements after a month of consistent use, consult your veterinarian to rule out underlying health issues that require medical treatment.
Benefits of Fiber Supplements for Dogs
Fiber plays a crucial role in maintaining your dog’s digestive health and overall wellness. Soluble fiber absorbs water in the digestive tract, forming a gel-like substance that helps regulate bowel movements. This type of fiber can help both constipation and diarrhea by normalizing stool consistency. Insoluble fiber adds bulk to stool and helps move material through the digestive system, promoting regular elimination and reducing the risk of impaction.
For dogs with anal gland issues, fiber supplements provide significant relief by creating bulkier, firmer stools that naturally express the glands during defecation. This natural expression reduces the need for manual expression by veterinarians and decreases the risk of anal gland infections and abscesses. Many veterinarians recommend fiber supplements as the first line of defense against chronic anal gland problems, often eliminating the need for more invasive treatments.
Fiber supports the health of beneficial gut bacteria, which play vital roles in digestion, immune function, and overall health. When fiber ferments in the large intestine, it produces short-chain fatty acids that nourish the cells lining the colon and support a healthy gut microbiome. This process can improve nutrient absorption, reduce inflammation, and strengthen the immune system. Dogs with inflammatory bowel disease or other chronic digestive issues often benefit from increased fiber intake.
Weight management becomes easier with fiber supplementation because fiber helps dogs feel full without adding significant calories. This satiety effect can reduce begging and prevent overeating, making fiber supplements valuable tools for dogs on weight-loss diets. Fiber also slows the absorption of glucose in the digestive tract, helping stabilize blood sugar levels in diabetic dogs or those at risk of developing diabetes.
Frequently Asked Questions
How much fiber supplement should I give my dog?
The appropriate amount of fiber depends on your dog’s weight and the specific supplement you’re using. For psyllium husk powder, the general recommendation is one-quarter to one-half teaspoon per 20 pounds of body weight per meal. For canned or powdered pumpkin, use one teaspoon per 20 pounds for small dogs, one tablespoon for medium dogs, and two tablespoons for large dogs per meal. Always start with a lower dose and gradually increase while monitoring your dog’s response. Follow the manufacturer’s dosing instructions on commercial supplements, as concentrations vary between products.
Can fiber supplements help with both diarrhea and constipation?
Yes, fiber supplements can address both issues because they normalize stool consistency rather than simply adding bulk. For diarrhea, fiber absorbs excess water in the digestive tract and firms up loose stools. For constipation, fiber draws water into the intestines and softens hard stools while stimulating bowel movements. This dual action makes fiber supplements versatile tools for managing various digestive issues. However, if your dog experiences chronic problems with either condition, consult your veterinarian to rule out underlying health issues.
How long does it take to see results from fiber supplements?
Most dogs show improvements in stool consistency within 24 to 48 hours of starting a fiber supplement. However, more complex issues like anal gland problems typically require consistent use over several weeks before you notice significant improvement. Give any new supplement at least two to four weeks of daily use before deciding whether it’s effective for your dog. Keep a journal to track changes in bowel movements, anal gland issues, and overall digestive comfort to better assess the supplement’s effectiveness.
Are there any side effects of giving fiber supplements to dogs?
When introduced gradually, fiber supplements are generally safe with minimal side effects. Some dogs may experience temporary gas, bloating, or changes in bowel movement frequency when first starting a supplement. These effects usually resolve within a few days as the digestive system adjusts. Too much fiber can cause excessive gas, nutrient malabsorption, or decreased appetite. Always ensure your dog has access to plenty of fresh water when using fiber supplements, as adequate hydration is essential for fiber to work effectively.
Can I use human fiber supplements like Metamucil for my dog?
Plain, unflavored psyllium husk products without additives can be safe for dogs, but many human fiber supplements contain artificial sweeteners like xylitol that are extremely toxic to dogs. If you choose to use a human product, verify that it contains only psyllium husk with no added flavors, sweeteners, or other ingredients. However, supplements formulated specifically for dogs are generally safer and easier to dose appropriately. When in doubt, choose a veterinarian-recommended product designed for canine use.
Should I give my dog fiber supplements every day?
The frequency depends on why you’re using the supplement. For chronic issues like anal gland problems or inflammatory bowel disease, daily supplementation often provides the best results. For occasional digestive upset, you can use fiber as needed until symptoms resolve. Many dogs benefit from consistent daily fiber supplementation as part of their regular diet, especially if they’re prone to digestive issues or have a history of anal gland problems. Consult your veterinarian about the best schedule for your dog’s specific situation.
Can puppies have fiber supplements?
Puppies can generally have fiber supplements, but they typically need much smaller doses than adult dogs. Most puppies eating high-quality puppy food get adequate fiber from their diet and don’t require supplementation unless recommended by a veterinarian for specific digestive issues. If your puppy has diarrhea or constipation, consult your vet before starting any supplements, as these symptoms could indicate serious health problems in young dogs. When supplementation is appropriate, use products specifically formulated for puppies or adjust adult doses significantly based on your veterinarian’s guidance.
What’s better for dogs: pumpkin or psyllium husk?
Both pumpkin and psyllium husk offer benefits, but they work slightly differently. Pumpkin provides both fiber and beneficial nutrients like vitamins A, C, and E, making it a nutritious addition to your dog’s diet. Psyllium husk is a more concentrated fiber source that’s particularly effective for regulating bowel movements and managing chronic digestive issues. For general digestive health and mild issues, pumpkin is an excellent choice. For more persistent problems or targeted anal gland support, psyllium or a combination of both ingredients often works better. Many premium supplements combine pumpkin and psyllium to provide comprehensive benefits.
