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My cat ate two salted potato chips 30 minutes ago — what signs of illness should I watch for and when?

Cats · Food safety

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

Short answer

Watch for signs like vomiting, diarrhea, or increased thirst within the next 4 to 12 hours. The salt, fat, and potential onion or garlic powder in chips can irritate a cat's stomach. A couple of chips is unlikely to cause a severe emergency in a healthy adult cat, but it's not a safe treat. Make sure fresh water is available and monitor her closely. If you see repeated vomiting, lethargy, or any tremors, contact your veterinarian promptly.

Chips / crisps — Food safety facts

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

Salt, fat and usually onion or garlic powder. A single plain chip is not an emergency.

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

Chips / crisps 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

Garlic and onion damage a pet's red blood cells and can bring on anaemia. Signs are often delayed for several days, so looking fine straight afterwards does not rule it out.

A heavy salt load drives up thirst and urination, and in the worst cases leads to sodium ion poisoning, which is a genuine emergency.

Rich, fatty food is the classic trigger for pancreatitis, a painful inflammation of the pancreas that usually needs veterinary treatment rather than rest alone.

The full verdict, portion guidance and serving notes are collected on the Chips / crisps food facts page.

Open the full food page: Chips / crisps food facts →