Why is my dog suddenly farting so much?

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The short answer!

Sudden increases in farting usually follow dietary changes, eating too fast, or swallowing air. New treats, table scraps, or switching foods without a gradual transition are common culprits. Stress and gut bacteria shifts can also play a role.

A sudden increase in wind typically points to something changing in your dog's digestive system, most often what's going in or how it's being processed.

Common triggers

Dietary shifts are the usual suspect. Introducing new food, treats, or table scraps gives gut bacteria unfamiliar material to ferment, producing more wind as a byproduct. Even 'upgrading' to a higher quality food can cause temporary increases if switched too quickly, as the microbiome needs time to adjust (1).
Eating speed matters too. Dogs who gulp food swallow air with every mouthful (a process called aerophagia), and that air has to go somewhere. Flat-faced breeds like Bulldogs and Pugs are particularly prone because of their facial structure.

Less obvious causes

Stress can disrupt gut motility and bacterial balance, leading to fermentation changes. If the sudden increase coincides with a house move, new pet, or routine change, the gut may be responding to emotional upheaval rather than dietary factors.
Food intolerances can also emerge over time. A dog who tolerated chicken for years might develop sensitivity, with increased wind as an early signal before other digestive signs appear.

When timing matters

If wind increases alongside loose stools, appetite changes, or lethargy lasting more than 48 hours, speak to your vet. Sudden onset with other symptoms can indicate infection, parasites, or underlying digestive conditions worth investigating.

References

  1. Pilla R, Suchodolski JS. The role of the canine gut microbiome and metabolome in health and gastrointestinal disease. Front Vet Sci. 2020;6:498. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC6971114/

This content is for general information only and does not replace veterinary advice. Supplements and nutritional products are not licensed veterinary medicines. Always speak to your vet before making changes to your dog’s diet, supplements, or care routine.

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owners also ask

What causes dogs to fart a lot?

Dogs fart when gut bacteria ferment undigested food, producing wind as a byproduct. High-fibre ingredients, hard-to-digest proteins, and rapid eating all increase fermentation. Some breeds are naturally more prone due to their anatomy.

How can I reduce my dog's farts?

Slow down mealtimes, transition foods gradually over 7 to 10 days, and identify problem ingredients through elimination. Probiotics may help stabilise gut bacteria. Consistent feeding times and avoiding table scraps make a noticeable difference for most dogs.

When should I worry about my dog's farting?

Occasional wind is normal. Concern is warranted when farting accompanies persistent loose stools, vomiting, appetite loss, bloated abdomen, lethargy, or blood in their poop. Sudden severe increases lasting more than 48 to 72 hours probably warrant a check-up with your vet.