True hemorrhoids are extremely rare in dogs. What most owners notice, the scooting, swelling, straining, or redness around their dog’s rear end, is almost always anal sac disease or, less commonly, rectal prolapse. The good news is that dietary changes can make a real difference for all of these conditions by producing firmer, bulkier stools that pass more easily and naturally express the anal glands on the way out.
What Your Dog Probably Has Instead
Dogs have two small anal sacs just inside the anus that release a scent-marking fluid every time they pass a firm stool. When those sacs don’t empty properly, they become impacted, inflamed, or infected. The signs look a lot like what you’d expect from hemorrhoids: scooting across the floor, licking or biting at the anal area, painful straining during bowel movements, and visible swelling near the anus.
Rectal prolapse is another possibility, where one or more layers of the rectum push outward through the anus. This looks like a red, cylinder-shaped mass protruding from the opening and typically happens after prolonged straining from constipation or diarrhea. If you see tissue protruding from your dog’s anus, that needs veterinary attention quickly rather than a diet change alone.
Regardless of the exact diagnosis, the dietary strategy is the same: produce well-formed stools that are easy to pass. Soft, loose stools don’t put enough pressure on the anal glands to empty them. Hard, dry stools cause painful straining. You’re aiming for the middle ground.
Fiber: The Most Important Dietary Change
Adding fiber to your dog’s food is the single most effective thing you can do. Fiber bulks up the stool and gives it a firm but not rock-hard consistency, which helps the anal glands express naturally and reduces the straining that irritates the rectal area. You want a mix of soluble fiber (which absorbs water and forms a gel) and insoluble fiber (which adds bulk and keeps things moving).
Plain canned pumpkin is the easiest place to start. Use 100% pure pumpkin, not pumpkin pie filling, which contains sugar and spices. The American Kennel Club suggests 1 to 4 tablespoons per meal depending on your dog’s size. Start at the low end and increase gradually over a few days. Pumpkin provides both soluble and insoluble fiber and most dogs happily eat it mixed into their regular food.
Psyllium husk (the active ingredient in Metamucil) is another option that works well for dogs with chronic bowel issues. A study of 37 dogs with large-bowel problems found that psyllium added to a highly digestible diet produced a very good to excellent response in most dogs, with a median starting dose of about 2 tablespoons per day. Use the unflavored, sugar-free version, and always offer plenty of water alongside it, since psyllium absorbs a large amount of liquid as it moves through the gut.
Too much fiber can backfire, though. Overloading your dog’s diet with fiber can actually cause blockages or worsen constipation if water intake doesn’t keep up. Add fiber gradually and watch how your dog’s stools respond over several days before increasing the amount.
Keeping Your Dog Hydrated
Fiber only works well when there’s enough water in the digestive system. A dehydrated dog eating a high-fiber diet will end up more constipated, not less. Make sure fresh water is always available, and consider adding water directly to your dog’s food at mealtimes.
Switching from dry kibble to canned wet food, or mixing wet food into your dog’s kibble, is one of the simplest ways to increase water intake. Wet food typically contains 70 to 80 percent moisture compared to about 10 percent in dry kibble. Texas A&M’s veterinary school specifically recommends this swap for dogs that struggle to stay hydrated. You can also add warm water or low-sodium broth (no onion or garlic) to kibble and let it soak for a few minutes before serving.
What to Avoid Feeding
Certain foods and feeding habits make straining worse. Very low-fiber diets, which include many grain-free and high-protein commercial foods, often produce small, hard stools that don’t adequately express the anal glands and require more effort to pass. On the other end, extremely rich or fatty foods can trigger loose stools or diarrhea, which also fails to empty the anal sacs and can lead to rectal irritation.
Table scraps are a common culprit. Fatty meats, cheese, and greasy leftovers can disrupt your dog’s digestion unpredictably. Bones, rawhide, and other hard-to-digest chews can cause constipation or create sharp fragments that irritate the rectal lining on the way out. Stick to your dog’s regular diet with the fiber additions described above, and avoid sudden changes in food type, which can cause digestive upset on their own.
Probiotics and Gut Health
Probiotics can help stabilize your dog’s digestion and improve stool quality over time. The most commonly used strains in canine supplements belong to the Lactobacillus, Bifidobacterium, and Enterococcus families. Dog-specific strains tend to adhere better to the canine intestinal lining than strains derived from other animals, so look for a supplement formulated specifically for dogs rather than using a human product.
Probiotics work best as a complement to dietary fiber, not a replacement. They help maintain healthy gut bacteria that support consistent digestion, which means fewer episodes of diarrhea or constipation that trigger anal gland problems. Many veterinary-formulated supplements combine probiotics with prebiotic fiber for this reason.
A Sample Feeding Approach
For a medium-sized dog (around 30 to 50 pounds), a reasonable starting plan looks like this:
- Base diet: A quality commercial dog food with moderate fiber content, ideally including some wet food for moisture
- Pumpkin: 1 to 2 tablespoons of plain canned pumpkin mixed into each meal
- Water: Fresh water always available, plus a splash of warm water or broth mixed into food
- Probiotic: A canine-specific supplement following the label’s dosage guidelines
Watch your dog’s stools over the first week. You’re looking for well-formed, moist stools that hold their shape but aren’t dry or crumbly. If stools become too loose, reduce the pumpkin. If they’re still hard and your dog is straining, gradually increase fiber or add a small amount of psyllium husk. Small adjustments over a week or two will get you to the right balance for your individual dog.
If dietary changes don’t improve symptoms within two to three weeks, or if you notice bleeding, a visible mass, or your dog seems to be in significant pain, the underlying issue likely needs direct veterinary treatment rather than diet management alone. Impacted or infected anal glands sometimes require manual expression or antibiotics, and rectal prolapse needs hands-on intervention.