By Dial A Vet Veterinary Team
Last updated: 10 November 2026
Potato skins have two faces. A raw peeling or a sprouted, green skin is on a veterinary toxicity list. A cooked, bacon-and-cheese loaded skin is a heavy, salty food. Either way, a cat nibbling the skin from your plate is worth a moment's thought.
Key takeaways
- Lort Smith Melbourne Animal Hospital says raw or green potatoes, and potato peelings, can poison cats, though cooked potato is not harmful.
- Loaded potato skins add bacon, cheese, salt and often onion.
- Plain cooked skin in a tiny amount is unlikely to hurt, but it is not useful.
- If your cat ate raw peel or green skin, call your vet.
- Related: potatoes, potato chips, ham.
Raw and green skin
Lort Smith says poisoning occurs only if the animal ingests raw or green potatoes. It describes raw potatoes as containing a combination of toxic alkaloids that can cause gastrointestinal irritation and neurological signs, and says that if your pet has eaten parts of a raw potato or the potato plant, including peelings, you should contact your veterinarian immediately. It lists the signs as vomiting, diarrhoea, lethargy, abdominal pain, drooling, wobbly gait, abnormal heart rhythm, muscle tremors and seizures, in a progression from gut to heart to nerves. Treatment may include fluids, anti-vomiting medicine and supportive care, and some pets are hospitalised for a few days.
The RSPCA Australia knowledgebase reminds us that cats are obligate carnivores, so a potato skin gives them nothing they need.
Cooked and loaded skins
- Bacon and cheese. Lort Smith rates salt as severe toxicity in cats at large intakes, and the ASPCA says dairy can cause diarrhoea and fatty foods can cause vomiting and potentially pancreatitis.
- Onion, chives and garlic. Often used as toppings. Pet Poison Helpline lists garlic as toxic, and Lort Smith says onions damage red blood cells, with signs 12 hours to five days later.
- Sour cream. Dairy again.
If your cat ate potato skin
- Work out whether it was raw, green, plain cooked or loaded.
- Offer fresh water.
- Do not make your cat vomit unless your vet tells you to, as Lort Smith advises.
- A small piece of plain, cooked skin: watch for the day.
- Any raw or green peel, or a loaded skin: call your vet or the Animal Poisons Helpline on 1300 869 738.
Signs to watch for
- Vomiting or diarrhoea
- Drooling
- Lethargy or hiding
- Unsteady walking
- Tremors or twitching
- Strong thirst
- Pale or yellow gums (after onion or garlic)
When to see a vet urgently
Go straight to a clinic for tremors, seizures, collapse, abnormal breathing or a very slow or fast heartbeat. Lort Smith says signs can progress from gastrointestinal to heart to nerves.
Cooking and clearing up
Skins are easiest to manage at the chopping board. Peel over a lidded caddy, bin the peelings straight away and wash the board before the cat jumps up. If you serve loaded skins, keep the plates on the table and clear them promptly, because the bacon and cheese smell draws cats in.
Do not leave a baking tray cooling on the stovetop where a cat can reach, and watch for sprouted or green potatoes in the pantry that you plan to peel later. If you are not sure whether what your cat ate was raw, assume it was and call your vet, because the advice differs.
FAQ
Are cooked potato skins safe?
Lort Smith says cooked potatoes are not harmful. The toppings and salt are what concern us.
What about sprouts and green patches?
Treat them as raw potato. Call your vet if your cat ate any.
Can I give my cat mashed potato?
Plain mash with nothing added is unlikely to harm. Butter, salt, garlic and cream change that.
Is sweet potato different?
It is a different plant. Check with your vet before offering any.
Talk with a vet
If your cat has eaten raw or green potato skin, call your vet first. For questions about a small amount or toppings, 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
- Lort Smith Melbourne Animal Hospital. Potatoes - cats.
- RSPCA Australia Knowledgebase. Do cats have special nutritional requirements?.
- Lort Smith Melbourne Animal Hospital. Salt - cats.
- ASPCA. People Foods to Avoid Feeding Your Pets.
- Pet Poison Helpline. Garlic Is Toxic To Dogs.
- Lort Smith Melbourne Animal Hospital. Onions Shallots Leeks - 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.