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My 4 kg cat ate three cooked, shelled shrimp 2 hours ago — when should I expect vomiting or diarrhea if it's going to upset her stomach?

Cats · Food safety

Last reviewed: 2026-09-05 · Reference ranges: ASPCA, Pet Poison Helpline & Merck Veterinary Manual

Short answer

If the shrimp were plain and fully cooked, she'll likely be fine. Stomach upset from rich or new food usually shows within 4 to 6 hours — you might see a single episode of vomiting or soft stool. The risk here is not toxicity, but the shrimp being too rich, seasoned, or not fully cooked. Watch for lethargy or repeated vomiting beyond that window. Offer her fresh water and her regular food. If she refuses to eat or seems unusually quiet by tomorrow morning, call your vet. For now, just keep an eye on her litter box.

Shrimp (cooked) — Food safety facts

Feed with care · Cats · full breakdown on the linked food page

Plain, fully cooked, shelled shrimp is okay occasionally. Raw or shell-on shrimp are a choking and bacteria risk.

Dogs and cats carry the same rating (Feed with care), so the notes below hold for either pet.

Shrimp (cooked) is not poisonous to cats, but it is easy to over-feed. Rich fat, salt or seasoning can bring on vomiting or diarrhoea within a day, and repeated large portions are a recognised trigger for pancreatitis.

If it ate some before you noticed, watch for vomiting, diarrhoea, loss of appetite, unusual tiredness or a painful, swollen abdomen over the next 24 hours. A one-off small amount in a healthy adult usually passes with water and rest; repeated exposure, a puppy or kitten, a senior, or a pet with an ongoing illness is a reason to call your vet the same day.

Why these cautions matter

Raw animal protein carries Salmonella and E. coli risk, and those bacteria can spread to the people in the household too.

Shrimp (cooked) can turn up now and then, but not as a daily habit: keep the rest of the day's food unchanged and watch the litter box and how quickly they finish the next meal.

The full verdict, portion guidance and serving notes are collected on the Shrimp (cooked) food facts page.

Open the full food page: Shrimp (cooked) food facts →