Serving advice
Treat grass 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 grass and watch stools and appetite over the next 24 hours.
Both dogs and cats may chew grass occasionally. Fresh grass contains no known toxins, but it can irritate the stomach and trigger vomiting, which some pets use to clear hairballs. Small amounts are generally safe; monitor for excessive vomiting or diarrhea.
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 grass?
YES — safe. Both dogs and cats may chew grass occasionally. Fresh grass contains no known toxins, but it can irritate the stomach and trigger vomiting, which some pets use to clear hairballs. Small amounts are generally safe; monitor for excessive vomiting or diarrhea.
How much grass can cats have?
Serve grass as a snack and keep it under about 10% of daily calories. Start with one small piece of grass and watch stools and appetite for the next 24 hours.
What reaction should I watch for after cats eats grass?
In the 24 hours after cats eats grass, look for vomiting, diarrhoea, gas or a drop in appetite. Both dogs and cats may chew grass occasionally. Fresh grass contains no known toxins, but it can irritate the stomach and trigger vomiting, which some pets use to clear hairballs. Small amounts are generally safe; monitor for excessive vomiting or diarrhea.
How often can cats have grass?
Treat grass 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 grass?
Rotate through the safe list — Cod or Haddock — 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.