Serving advice
Treat Brussels sprouts as a snack rather than part of the daily ration — the usual ceiling is about 10% of daily calories. Start with one small piece of Brussels sprouts and watch stools and appetite over the next 24 hours.
Safe cooked and plain, but they cause gas in larger amounts.
Dogs and cats carry the same rating (Safe to share), so the notes below hold for either pet.
There is no poisoning risk here, and the usual problem is simply eating too much at once: a heavy fat or salt load can bring on loose stools or a single vomit. Offer water, keep an eye on the pet for 24 hours, and do not induce vomiting.
Other foods that are safe to share
The full A–Z food list groups every food by verdict for each species.
Frequently asked questions
Can cats eat Brussels sprouts?
YES — safe. Safe cooked and plain, but they cause gas in larger amounts.
How much Brussels sprouts can cats have?
Serve Brussels sprouts as a snack and keep it under about 10% of daily calories. Start with one small piece of Brussels sprouts and watch stools and appetite for the next 24 hours.
What reaction should I watch for after cats eats Brussels sprouts?
In the 24 hours after cats eats Brussels sprouts, look for vomiting, diarrhoea, gas or a drop in appetite. Safe cooked and plain, but they cause gas in larger amounts.
How often can cats have Brussels sprouts?
Treat Brussels sprouts as an occasional extra, once or twice a week at most, and keep the portion small next to your cat's regular meals — those still do the nutritional work.
What else can cats have besides Brussels sprouts?
Rotate through the safe list — Butternut squash or Celeriac — instead of the same thing every time; a mix covers more nutrients than any single extra, and it stops your cat holding out for one favourite.