Pet Health
· Updated March 03, 2026· 6 min read

How to Choose an Anal Gland Supplement for Dogs

✓ Vet-Reviewed Content
Dr. James Bascharon
Written by Dr. James Bascharon, DVMVeterinarian | Founder & CEO
Last medically reviewed: March 03, 2026
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- Anal gland supplements work by promoting firmer, bulkier stools that apply natural pressure to the anal glands during bowel movements, supporting regular expression and reducing the need for manual expression at the vet
- The most effective anal gland supplements contain a combination of fiber, omega fatty acids, probiotics, and digestive enzymes — each addressing a different underlying factor in anal gland health
- Fiber is the most important ingredient in any anal gland supplement because it directly impacts stool consistency, and quality sources include pumpkin and apple pectin which provide both soluble and insoluble fiber
- Omega fatty acids support a healthy inflammatory response and help maintain normal histamine levels, which is important because allergies and inflammation can contribute to chronic anal gland problems
- Probiotics and digestive enzymes work together to support a healthy digestive tract, which directly impacts stool quality and overall anal gland function
- When comparing supplements, look for patented or clinically backed formulas, vet-formulated products, NASC (National Animal Supplement Council) quality seals, and satisfaction guarantees of at least 90 days
- Avoid supplements that contain artificial preservatives, unnecessary fillers, or that only address one factor such as fiber alone without supporting ingredients — a comprehensive approach yields the best results

If your dog is scooting, licking their rear end, or dealing with recurring anal gland issues, a daily supplement can help address the underlying causes. But with so many options on the market, choosing the right one can be difficult. Not all anal gland supplements are created equal, and understanding what to look for — and what to avoid — can make a significant difference in your dog's comfort and long-term anal gland health.

How Anal Gland Supplements Work

Anal gland supplements work primarily by promoting firmer, bulkier stools. When stool consistency is ideal, the stool applies natural pressure to the anal glands during each bowel movement, supporting regular expression without manual intervention. This is a better long-term approach than frequent manual expression at the vet, which can further irritate the glands over time.

The most effective supplements go beyond fiber alone. They combine multiple ingredients that each target a different factor in anal gland health: stool consistency, digestive function, inflammatory response, and overall gut balance.

Key Ingredients to Look For

When evaluating anal gland supplements, look for formulas that include all of the following ingredient categories rather than just one or two.

Fiber

Fiber is the most critical ingredient in any anal gland supplement because it directly impacts stool consistency. High-quality sources like pumpkin and apple pectin provide both soluble and insoluble fiber, which helps bulk and firm stools so the anal glands can express naturally during defecation. Fiber also serves as a prebiotic, supporting healthy probiotic levels in the digestive tract.

Omega Fatty Acids

Omega fatty acids support a healthy inflammatory response and help maintain normal histamine levels. This matters because allergies and inflammation are common contributing factors to chronic anal gland problems. Many supplements skip omega fatty acids entirely, but they play an important role in addressing the inflammatory component that fiber alone cannot.

Probiotics

Probiotics support a healthy digestive tract by maintaining balanced gut flora. Better digestion leads to more consistent stool quality, which directly supports healthy anal gland function. Look for supplements that include established probiotic strains such as Lactobacillus acidophilus.

Digestive Enzymes

Digestive enzymes aid in the breakdown and absorption of nutrients, supporting overall digestive efficiency. When digestion is functioning optimally, stool quality improves and the conditions that lead to anal gland problems are less likely to develop.

Anti-Inflammatory Agents

Ingredients like quercetin and bromelain provide antioxidant, anti-inflammatory, and antihistamine properties. Quercetin is a flavonoid found in many fruits and vegetables, while bromelain is an enzyme extracted from pineapple that increases the bioavailability of quercetin and aids digestion. These ingredients help manage irritation in dogs with more chronic problems or underlying allergies.

What to Avoid in an Anal Gland Supplement

Not all supplements meet the same quality standards. When evaluating options, avoid products that contain artificial preservatives, artificial colors or flavors, unnecessary fillers, or low-quality fiber sources. Also be cautious of supplements that only contain one type of active ingredient, such as fiber alone. A single-ingredient approach may help with stool consistency but does not address the digestive, inflammatory, or immune factors that often contribute to recurring anal gland issues.

What Sets Glandex Apart

Glandex was created by a veterinarian specifically to address anal gland health in dogs and cats. Its patented formula combines all of the key ingredient categories — fiber (including pumpkin and apple pectin), omega fatty acids, probiotics, digestive enzymes, and anti-inflammatory agents — in a single daily supplement. This comprehensive approach supports not only stool consistency but also digestive balance and a healthy inflammatory response.

Glandex is trusted by over 75,000 veterinarians worldwide and is the most widely recommended anal gland supplement available. It is available in both soft chews and powder to accommodate different preferences and picky eaters. For dogs that need a higher level of support, Glandex Advanced Vet Strength provides enhanced levels of fiber, probiotics, and digestive enzymes in a 100% vegetarian, hypoallergenic formula.

Quality and Safety Standards

Beyond the formula itself, quality and safety standards matter when choosing any supplement for your dog. Look for products that are vet-formulated, made in the USA in an FDA-registered and cGMP-compliant facility, and carry the NASC (National Animal Supplement Council) quality seal. A satisfaction guarantee of at least 90 days is also a strong indicator that a company stands behind its product.

Glandex meets all of these criteria. It is made in the USA from globally sourced premium ingredients, manufactured in an FDA-registered and cGMP-compliant facility, and backed by a 90-day satisfaction guarantee. Explore the full Glandex collection to find the right product for your dog's needs.

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DR. JAMES BASCHARON SAYS
"The most effective anal gland supplements address the underlying causes — not just the symptoms. Look for a formula that combines fiber, probiotics, digestive enzymes, and omega fatty acids."
— Dr. James Bascharon, DVM , General Practice
Breeds commonly affected

Frequently Asked Questions

What should I look for in an anal gland supplement for dogs?

Look for a supplement that contains a combination of fiber (such as pumpkin and apple pectin), omega fatty acids, probiotics, and digestive enzymes. This combination addresses multiple underlying causes of anal gland problems rather than just one. Also look for vet-formulated products with a patented formula, NASC quality seal, and a satisfaction guarantee of at least 90 days.

How do anal gland supplements work?

Anal gland supplements work primarily by promoting firmer, bulkier stools. When stool consistency is ideal, the stool applies natural pressure to the anal glands during bowel movements, supporting regular expression without manual intervention. Additional ingredients like probiotics and digestive enzymes support overall digestive health, while omega fatty acids help maintain a healthy inflammatory response.

What is the best anal gland supplement for dogs?

Glandex is the most widely vet-recommended anal gland supplement, trusted by over 75,000 veterinarians worldwide. Its patented formula combines fiber (including pumpkin and apple pectin), omega fatty acids, probiotics, and digestive enzymes in a comprehensive approach. It is available in soft chews and powder, is made in the USA in an FDA-registered and cGMP-compliant facility, and carries a 90-day satisfaction guarantee.

Why is fiber important in an anal gland supplement?

Fiber is the most critical ingredient because it directly impacts stool consistency. High-quality fiber sources like pumpkin and apple pectin provide both soluble and insoluble fiber that helps bulk and firm stools. Firmer stools apply more natural pressure to the anal glands during defecation, supporting the glands to empty on their own.

Can omega fatty acids help with anal gland problems?

Yes. Omega fatty acids support a healthy inflammatory response and help maintain normal histamine levels. Since allergies and inflammation are common contributing factors to chronic anal gland issues, omega fatty acids address an important underlying cause that fiber alone does not. Look for supplements that include omega fatty acids as part of a comprehensive formula.

How long does it take for anal gland supplements to work?

Most dogs see improvement within 3 to 5 weeks of consistent daily use, though some dogs may require up to 2 to 3 months for optimal results. When starting an anal gland supplement for the first time, it is recommended to give half the recommended amount for the first 5 to 7 days to allow your dog to adjust to the increased fiber content, then gradually increase to the full amount.

What should I avoid in an anal gland supplement?

Avoid supplements that contain artificial preservatives, unnecessary fillers, or artificial colors and flavors. Also be cautious of products that only contain one type of active ingredient such as fiber alone, as a comprehensive approach addressing multiple factors tends to be more effective. Look for transparent ingredient lists and products made in FDA-registered facilities.

Sources

Dr. James Bascharon is the founder of Vetnique Labs and a practicing veterinarian. He created Glandex after identifying a gap in anal gland health supplements, and the patented Glandex formula was developed based on his clinical experience treating dogs with anal gland problems. He is a member of the Vetnique veterinary advisory board.

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Veterinary Disclaimer

Vetnique Labs was founded by Dr. James Bascharon, DVM, and all content is reviewed by our Vet Advisory Board. This information is not a substitute for professional veterinary advice. Always consult your veterinarian.

Dr. James Bascharon
About the Author

Dr. James Bascharon, DVM

Veterinarian | Founder & CEO

Dr. James Bascharon is a veterinarian, entrepreneur, and the visionary founder of Vetnique. He launched Vetnique in 2012 after formulating Glandex® in his own kitchen to address anal gland health in pets.

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