Green or sprouted potato — Food safety facts
Do not feed · Cats · full breakdown on the linked food page
Green skin and sprouts contain solanine, which causes vomiting, tremors and heart problems.
Dogs and cats carry the same rating (Do not feed), so the notes below hold for either pet.
Green or sprouted potato should not be given to cats at all. Even a small amount can do harm, so there is no portion small enough to be safe.
Do not induce vomiting and do not give milk or oil to “dilute” it. Note the food and roughly how much was eaten, then call your vet or a pet poison hotline and follow their advice on whether to bring the pet in straight away.
The full verdict, portion guidance and serving notes are collected on the Green or sprouted potato food facts page.