The full answer
The American Kennel Club describes Brussels sprouts as containing no toxins or poisons for dogs. The main downside is gas: sprouts contain isothiocyanates, which affect how the gut moves food along, and even small or moderate amounts can cause flatulence.
Too many can cause stomach upset and diarrhoea. The gas itself isn't harmful, but contact a vet if symptoms last longer than a few days.
Veterinary guidance is to cook sprouts until softened and cut them into bite-sized pieces, because whole sprouts can be a choking hazard.
Risks and Things to Know
- Gas is common, even with small amounts.
- Larger amounts can cause stomach upset and diarrhoea.
- Whole sprouts can be a choking hazard.
- Butter, bacon, garlic, onion and seasoning used on sprouts for people are a separate concern.
How much is okay?
One or two cooked sprouts, cut up, is plenty. They're gassy, so go slowly and cut back if your dog gets windy or has loose stools.
Keep it an occasional extra, not a regular part of meals.
How Should I Prepare It?
- Trim the stem end and remove any damaged outer leaves.
- Steam or boil plainly until soft — no butter, oil, salt or seasoning.
- Halve or chop into bite-sized pieces.
