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Why Dogs Fart So Much (and How to Minimize the Stink)

Expert solutions for your pup's flatulence.

by Dr. Shea Cox, DVM, CVPP, CHPV
July 23, 2021
Same sex couple with their dog lying on the bed laughing at his farts
Nuria Seguí / Stocksy

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Even the most obsessed pet parent has to admit that dog farts are frequent and rarely as adorable as their beloved pups are. As much as we might hate to admit it (and smell it) farts aka flatulence are a normal biological function in dogs—and humans, let's be honest. It's the natural result of the surprising amount of air that is swallowed just with the simple act of eating. We explore why pups fart so much and whether there's anything you can do to reduce the stink.

What Causes Dog Farts

Contrary to popular belief, more than 99 percent of the gases that pass from the intestinal tract are odorless (whew!). When they do happen, dog farts (flatulence) are caused from an excess of gases in the intestinal tract. They may represent gas produced in the biochemical process of digestion, gas diffusion from the bloodstream, gases produced by the bacteria that populate the intestinal tract or air that has been swallowed.

The amount of air swallowed tends to increase when dogs feel they must eat quickly, or in brachycephalic breeds (dogs with a compressed upper jaw and a short muzzle) that tend to breathe more by mouth than by nose.

Dietary fiber in pet food can also cause a dog to fart as it is not easily digested by its own enzyme systems. Fiber is, however, readily digested by the gas-producing bacteria that live in the colon. As fiber is broken down here, hydrogen sulfide is produced, which is the cause of the really stinky gases. Therefore, a diet that is heavy in fiber further promotes a “happy environment” as well as “food” for the bacteria, ultimately producing more gas and more farts.   

How to Clear the Air

Start with their food: the best dog food for less flatulence is a low-residue diet. A low-residue diet is designed to reduce the frequency and volume of stools, while prolonging transit time through the intestine. It is similar to a low-fiber diet, but includes restrictions on foods that increase bowel activity. Changing to a low-residue diet means that most of the nutrients of the food are digested and absorbed by the pet before they reach the colon, where the gas-forming bacteria live. Less food for the bacteria equals less bacteria, which equals less gas formed and less dog farts. Offering your dog a highly digestible diet is one of the major ways to combat flatulence.

Sometimes just going through a case and/or bag of such a low-residue diet solves the problem and the pet can return to regular food afterwards. If necessary, the therapeutic diet can become the pet’s regular food. Low-residue diets are available through your veterinarian, pet supply stores or can be cooked at home (boiled white rice, skinned chicken, cottage cheese and balanced with vitamins and minerals constitute low-residue ingredients).

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More Dog Fart Remedies

There are other easy ways to help reduce excessive dog farting, including:

  • Feeding smaller meals several times daily instead of one larger daily meal

  • Feeding a mixture of dry and canned foods

  • Discouraging rapid eating by placing an overturned small bowl inside the pet’s regular food bowl, preventing them from taking large mouthfuls

  • Avoiding soy, beans and peas in the diet

  • Avoiding any treats containing milk, cheese or other forms of lactose

  • Avoiding fresh or dried fruit treats

  • Avoiding canned foods containing the texturing ingredient carrageenan

  • Increasing activity: A sedentary lifestyle can increase the amount of gases produced as well as how long they “hang out” in the digestive tract. Activity increases gastrointestinal motility, which in turn expels gas and increases regularity of bowel movements.

Medical Conditions That Increase Flatulence

Changing the diet and ruling out actual intestinal disease are of primary importance in addressing the dog's flatulence. Some disease processes that can cause an increase in dog farts include:

  • Inflammatory bowel disease

  • Irritable bowel syndrome

  • Antibiotic-responsive intestinal disorders

  • Cancer

  • Parasites, viral or bacterial inflammation of the intestines

  • Food allergy or intolerance

  • Inadequate production of digestive enzymes by the pancreas

Consider Medications and Herbal Supplements

For excessive dog farts, sometimes medication can help. Although there are many products available, most are unfortunately not as helpful as they are touted to be, or not labeled for animal use. There are more than 30 herbal and botanical preparations available to reduce gas in the stomach and intestines; however, the dosage, safety and efficacy are unknown.

If further therapy is needed, the following products may be of help for dog flatulence:

  • Yucca shidigera supplementation: Currently, this extract is labeled as a flavoring agent for pet food but it is also available as an oral supplement. Several studies have shown that it helps decrease the odor in flatulence.

  • Zinc acetate supplementation: Zinc binds to sulfhydryl compounds in flatulence ultimately serving to deodorize the gas.

  • Non-absorbable antibiotics: Such antibiotics kill the gas-forming bacteria of the colon and may be helpful as long as their use is not ongoing.

Do Instant Dog Fart Cures Work?

Some popular, but more questionable, products with regards to treating excessive dog flatulence include:


There are many ineffective probiotics being marketed and so it is important to use one that has been shown to contain live cultures that withstand stomach digestion. It is unknown if this type of product will really help in reducing dog flatulence, as it is asking a great deal for these bacteria to survive the acid environment of the stomach, travel through the many feet of small intestines, and finally reach the colon in the attempt to displace the gas-forming resident bacteria. Still, these are unlikely to be harmful, and can be beneficial in other ways outside of the realm of dog farts, such as helping to stabilize the intestinal microenvironment.

Activated charcoal tablets:

These tablets are not likely to be effective because the charcoal-binding sites are filled on the journey from mouth to colon, so by the time the tablet gets to the gas-forming large bowel bacteria, it has essentially already been used up.


This product may control the volume of gas produced, but not the odor. It is an antifoaming agent that reduces gas bubbles. This may be helpful at reducing our dog's gas discomfort, but not the stench.

Pancreatic enzyme supplementation:

It is unlikely that these extra digestive enzymes would help a pet in the absence of actual exocrine pancreatic insufficiency. Furthermore, this treatment is relatively expensive for something that may only be slightly helpful.

While dog farts and flatulence is a normal part of everyday life, if the problem persists or seems severe, it is recommended that you consult with your veterinarian.

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Dr. Shea Cox, DVM, CVPP, CHPV

Dr. Shea Cox is the founder of BluePearl Pet Hospice and is a global leader in animal hospice and palliative care. With a focus on technology, innovation and education, her efforts are changing the end-of-life landscape in veterinary medicine.