Why Do Dog’s Farts Smell So Bad? Foul Facts

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Author: Jeanette Hampton

Have you ever wondered “Why do my dog’s farts smell so bad?” Those smelly moments when your dog makes any room inhabitable. But, there’s more to it than just the smell.

Understanding why it happens is important because it can help make your dog healthier and make your home smell better. So, let’s explore the world of “Why do my dog’s farts smell so bad?” to figure out what’s going on and how to deal with it.

Why Do Dog's Farts Smell So Bad

Why Do Dog’s Farts Smell So Bad?

Dogs fart when gas builds up in their gut and passes out through their bottom. Farting is a normal part of digestion. Smelly or excessive farting in dogs can be caused by a change in diet or eating something they shouldn’t. Farting can also be caused by eating too fast.

During digestion, bacteria in the intestinal tract break down food into nutrients, and stinky hydrogen sulfide gas is released as a by-product for certain foods in the colon. Let’s see some other factors that can cause this problem:

1) Diet

What your dog eats really matters when it comes to the smell of their farts. Some foods, like eggs or veggies such as broccoli and cauliflower, contain sulphur compounds that can make their gas pretty stinky.

Also, the kind of diet your dog has, especially how much protein and fat it contains, affect how their farts smell. “Diets with lots of protein can make their gas extra smelly because they create more sulphur-rich gases during digestion”, says the experts at PetMD.

dog farting

Diets high in fat can also lead to stronger smells as they cause more fermentation in the stomach[1].

2) Digestive Processes

When dogs eat, their stomach and intestines use bacteria to break down the food. This process can create gases, like hydrogen sulphide, which don’t smell very nice. The kinds of bacteria in the stomach and how much gas is produced can make the farts smell worse.

Having the right balance of these bacteria is crucial for proper digestion. If there’s an imbalance, it can lead to bad digestion, more gas, and smelly farts.

3) Gastrointestinal Issues

Inflammatory bowel disease (IBD) is a condition that affects a dog’s stomach and intestines, causing ongoing inflammation and discomfort.

When dogs have IBD, their stomach and intestines don’t work as they should, leading to more gas and often smelly farts. Treating IBD with the right food and medicine can make the dog feel better. Food allergies can also make a dog’s stomach and intestines act up, creating extra gas.

When a dog is allergic to certain foods, it can make their stomach and intestines swell and disrupt digestion, causing those unpleasant farts“, says the experts at WebMD.

Common Dog Fart Odors

Sulphuric smells, like rotten eggs, can be caused by certain foods or an upset tummy. To make them better, try changing what your dog eats and using probiotics to help their tummy bacteria.

If the farts smell fishy or like ammonia, it might be because of some foods. To fix this, change your dog’s diet and control how much they eat. Rotten smells happen when food doesn’t digest well.

This can cause food problems or health issues. If your dog has these smelly farts, talk to your vet to check for health problems and maybe change their diet to something easier to digest.

Dog Fart Odors

How to Address Bad Dog Farts

Once you know the troublemakers, shift to a diet with gentler ingredients on your dog’s stomach. Let’s see some other tips to tackle this issue:

  • Find out which foods make your dog’s farts stink. Keep a food diary to spot culprits like beans, broccoli, or certain grains.
  • Don’t give your dog too much food. Overeating can lead to more gas; smaller portions can help reduce this problem.
  • Instead of one big meal, feed your dog smaller portions throughout the day. This can ease digestion and cut down on gassiness.
  • Exercise helps keep your dog’s digestive system in good shape. A daily walk or play can make a big difference.
  • Probiotics (good bacteria) and digestive enzymes can balance your dog’s stomach[2], making it easier to digest food and reducing foul odours.

If your dog’s farts persist and are unusually smelly then consult a vet. The vet can perform tests to pinpoint issues, such as food allergies or infections, and provide treatments to improve your dog’s digestive health.

Bad Dog Farts

Preventive Measures

Choose the dog food that’s easy on your dog’s stomach. Look for options with fewer ingredients that your dog is sensitive to and avoid overly rich or spicy foods.

Consider using slow-feeding bowls or puzzle feeders. These can help your dog eat more slowly, reducing the air they swallow and the likelihood of gas.

Stick to a consistent feeding routine. Regular meals help regulate your dog’s digestive system and reduce the chances of gas.

Keep an eye on your dog’s overall health and behaviour. If you notice any unusual changes in their farting patterns or other signs of discomfort, it’s important to investigate and adjust as needed to keep your dog happy and healthy.


1. Are Dog Farts Toxic to Humans?

Sitting next to a dog that’s farting can be an unpleasant experience. The gaseous odours that emanate from a dog can be surprising and overbearing to the senses. In most cases, dog gas is harmless.

2. Why Do Dog Farts Smell So Bad?

If your dog’s farts smell, the bacteria in its large intestine are getting too much food. This is either because too much-undigested food enters the large intestine or the food stays there too long. To reduce farting, choose a dog food that is quick and easy to digest.

3. Why Do My Dog’s Farts Smell Like Rotten Eggs?

They’re Having Too Much Human Food. Whether they’re being offered human foods by you, being scraped something cheeky off another member of your household’s plate, or they are rummaging through the trash, high-fat and high-sodium foods can make your dog’s farts smell of rotten eggs.


While dog farts can be smelly, remember they’re a fact of life. We can laugh about it, there’s an important lesson here.

It’s really vital to take care of your dog’s tummy because stinky farts can be a sign of diet or health problems that need looking after. So, next time you wonder, “Why do my dog’s farts smell so bad?” remember that addressing this issue isn’t just about freshening the air.

It’s about being a responsible pet parent who cares for their dog in every way possible. Now excuse me while I go light a scented candle after writing about dog farts for the last few minutes!


  1. Li, Z., Wang, J., Hu, X., Zhu, L., Jiang, Y., Gao, M., & Zhan, X. (2022). The effects of high-fat foods on gut microbiota and small molecule intestinal gases: release kinetics and distribution in vitro colon model- NIH
  2. Manucy, T., DVM. (2023). Probiotics for dogs: Do they work? PetMD
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Jeanette Hampton
Jeanette Hampton is a content writer at WWD and an expert on all things pets. She’s been writing pet blogs for over 5 years and knows everything there is to know about dogs. Jeanette enjoys writing about pet-related topics because she enjoys helping people learn more about their furry friends.

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