Food for Gassy Dogs: What to Feed and What to Skip

Some dogs can clear a room. If yours is one of them, you're in good company, and the fix often starts in the food bowl. Here's what actually helps, based on guidance from veterinary sources.

What Should You Feed a Gassy Dog? The Short Answer

Look for a highly digestible food that's low in fiber and hard-to-digest ingredients, and slow down how fast your dog eats. VCA Animal Hospitals explains that a highly digestible, low-residue food leaves less behind for gut bacteria to ferment, which means less gas.

Some gas is normal. The AKC says most dogs pass a little every day. Diet changes make sense when the gas is frequent, unusually smelly, or new.

Why Dogs Get Gassy in the First Place

VCA describes three sources of gut gas: swallowed air, gas made inside the gut, and gas that diffuses in from the bloodstream. The first two are the ones you can influence.

Swallowed air

VCA says swallowed air most likely makes the largest contribution to flatulence. Eating too fast and exercise both increase the air a dog gulps. PetMD adds competition with other pets at mealtime and heavy panting after exercise. Short-nosed breeds also tend to swallow more air because of how their airways are built.

Fermentation in the gut

The rest comes from bacteria in the colon breaking down carbohydrates and fiber. VCA notes that both soluble and insoluble fiber are fermented this way. The smell mostly comes from sulfur-containing gases like hydrogen sulfide, which is why some foods produce a much stronger odor than others.

Ingredients That Can Make Gas Worse

PetMD lists these common dietary causes of excess gas:

• Sudden diet changes
• Hard-to-digest foods, such as soybeans and beans
• Spoiled food
• High-fat diets
• Milk and other dairy products
• Spicy foods
• High-fiber foods

When you read your dog's food and treat labels, VCA flags these specific ingredients as possible contributors: soy fiber, soybean hulls, pea fiber, psyllium, pectin, bran, beet pulp, fruits, and high-fructose corn syrup. It also notes that vegetarian dog foods can be a problem, because they're likely to contain sulfur-containing vegetables and legumes.

Healthy extras can play a part too. The AKC says vegetables like cauliflower, broccoli, and Brussels sprouts are nutritious treats, but large amounts may add to the gas. Our guide to broccoli and cauliflower for dogs covers sensible portions.

Dairy deserves its own mention. The AKC quotes a veterinarian who says most dogs are lactose intolerant, so cheese and milk are common culprits. If cheese is your go-to training treat, our guide on whether dogs can eat cheese explains how to keep it small.

What to Look For in Food for Gassy Dogs

VCA's guidance points to a few practical things to look for:

1. High digestibility, low residue. Fewer non-digestible components means less material for gut bacteria to ferment.
2. A rice-based carbohydrate. Foods that use rice may generate less gas than those relying on wheat or corn.
3. Moderate fiber. VCA suggests it may be best to keep fiber at 5% or less on a dry matter basis for gassy dogs.
4. Moderate protein, without soy. VCA says dry matter protein shouldn't exceed 30%, and dogs with offensive gas should avoid soy protein.

VCA gives one example of a swap that may help: moving from a food based on corn, chicken, and soybean meal to one based on lamb, rice, and barley. It also notes that therapeutic diets made for digestive health exist, and your vet may suggest one. Expect some trial and error, since VCA says it may take a couple of tries to find the best fit. Our guide to dog food ingredients can help you decode the label.

How to Switch Foods Without Making It Worse

Changing foods too quickly can cause gas, diarrhea, and other digestive upset. The AKC recommends a gradual transition over about a week, mixing in more of the new food each day. Our step-by-step guide to changing dog food walks through the ratios.

VCA suggests starting with the labels of every food and treat your dog eats. Look for the ingredients listed above, then talk with your vet about the best next step for your dog.

Feeding Habits That Help

How your dog eats matters as much as what they eat. VCA and PetMD both recommend:

• Smaller, more frequent meals instead of one or two large ones
• Slow-feeder bowls, puzzle feeders, or interactive food toys for fast eaters
• Feeding dogs in separate areas so no one feels the need to race
• A quiet, low-stress spot for meals
• Regular exercise, which the AKC says may help food move through the gut more efficiently

VCA adds that a walk within 30 minutes of a meal encourages a bowel movement and may help release excess gas. The AKC also suggests keeping trash secured and teaching "leave it," since raiding the bin or litter box can cause foul-smelling gas.

When to See Your Vet

Diet tweaks are a good first step for a healthy dog, but gas can sometimes point to something more. PetMD recommends a vet visit if your dog's gas comes with:

• Vomiting
• Diarrhea
• Weight loss
• Lethargy
• Loss of appetite

The AKC lists conditions that can cause excess gas, including colitis, inflammatory bowel disease, intestinal parasites, and pancreatitis. It also recommends a vet check if gas starts suddenly or comes with blood in the stool. Your vet may suggest a restricted diet to identify trigger ingredients, or medications such as simethicone or probiotics once a medical cause is ruled out. PetMD advises talking to your vet before giving any gas-relief product. Our guide on how to tell if your dog is sick can help you spot other warning signs.