By Dial A Vet Veterinary Team
Last updated: 10 November 2026
A cat that steals a chip from the bag gets a salty, fatty, crunchy mouthful. The chip itself is not a poison. What matters is how many it ate and what the flavouring contains, because the salt and the powders on the surface are what drive the risk.
Key takeaways
- A single plain chip is unlikely to cause trouble, but chips offer nothing a cat needs.
- Chips are high in salt. Lort Smith Melbourne Animal Hospital rates salt as severe toxicity in cats at large intakes.
- Onion, garlic and sour cream flavours add other risks.
- Chips are also fatty, which can upset the stomach.
- Related: potatoes, potato skins, pickled cucumbers.
Salt first
Pet Poison Helpline says salt overdose causes vomiting, diarrhoea, stumbling, disorientation, tremor, seizure and collapse. Lort Smith says clinical signs occur within minutes, that salt draws fluid out of cells and that severe dehydration can lead to kidney failure. A cat has a small body, so a handful of salty chips is a lot of salt for it. The ASPCA says excessive salt can also cause increased thirst and urination.
The flavour powders
- Onion and garlic. Common in sour cream and onion, barbecue and chicken flavours. Lort Smith says onions cause oxidative damage to red blood cells and can cause anaemia, with signs showing up to five days later. Pet Poison Helpline lists garlic as toxic.
- Dairy. Sour cream and cheese flavours can cause diarrhoea, according to the ASPCA.
- Spice and chilli. Irritate the mouth and stomach.
- Fat. The ASPCA says fatty foods can cause vomiting, diarrhoea and potentially pancreatitis in some pets.
Raw potato versus chips
Cooked potato is not harmful to cats, according to Lort Smith, but raw or green potato and potato peelings are. Chips are cooked, so the toxic alkaloids are not the concern here. The salt and flavouring are.
If your cat ate chips
- Check the flavour and the amount.
- Offer fresh water.
- Do not make your cat vomit.
- A chip or two of plain flavour: watch for the day.
- A handful, a flavoured bag with onion or garlic, or a small kitten: call your vet or the Animal Poisons Helpline on 1300 869 738.
Signs to watch for
- Strong thirst, frequent urination
- Vomiting or diarrhoea
- Lethargy
- Pale or yellowish gums
- A tender belly
- Tremors, stumbling or seizures (urgent)
When to see a vet urgently
Go to a clinic for tremors, collapse, seizures, repeated vomiting or a cat that refuses water. VCA advises seeing a vet when vomiting comes with fever, lethargy, loss of appetite, abdominal pain or diarrhoea.
Making the bag cat-proof
Chip packets crackle, and the sound alone draws many cats over. Close the bag with a clip, pop it in a cupboard and tip leftover chips into the bin rather than leaving them in a bowl. If you are sharing a plate on the couch, put the plate out of reach before you stand up.
If you want your cat to have something crunchy, a few pieces of its own dry food are a better treat. Fresh water should always be available, and it is worth checking the bowl is full after any salty-food incident because a thirsty cat will drink more than usual.
What to do with leftovers
After a party, empty bowls and bags go straight into a bin with a lid. Dips that sit beside the chips are often full of onion and garlic, so clear those too. If your cat has already helped itself, keep the bag so you can read the flavour and salt content to your vet.
FAQ
Are baked chips or reduced-salt chips safer?
They contain less salt but are not food for cats. Check the flavour for onion and garlic.
Can cats eat hot chips from a takeaway?
Plain hot chips with salt are not a good snack. Salt, oil and sauces add up.
Why does my cat love crisps?
Fat and salt smell appealing. Keep the bag closed.
What about corn chips or crackers?
They share the salt and fat problems.
Talk with a vet
If your cat has eaten a lot of chips and you are not sure whether to worry, book a video consult with Dial A Vet's real vets and vet nurses. We help with dogs and cats, with same-day and extended hours. Book a Dial A Vet consult.
References
- Pet Poison Helpline. Salt Is Toxic To Pets.
- Lort Smith Melbourne Animal Hospital. Salt - cats.
- ASPCA. People Foods to Avoid Feeding Your Pets.
- Lort Smith Melbourne Animal Hospital. Onions Shallots Leeks - cats.
- Pet Poison Helpline. Garlic Is Toxic To Dogs.
- Lort Smith Melbourne Animal Hospital. Potatoes - cats.
- VCA Animal Hospitals. Vomiting in Cats.
Disclaimer: Educational only. This page does not replace an examination or advice from your own veterinarian. If you are worried about your pet right now, contact your local vet or nearest emergency vet clinic.