Pineapple — Food safety facts
Feed with care · Cats · full breakdown on the linked food page
Safe in small fresh pieces. Skip the spiky skin and core. Too much causes diarrhoea.
Short answer
A tiny piece of fresh pineapple flesh is generally safe, but feed it with care. Always remove the tough, spiky skin and the hard central core first. Too much can easily lead to diarrhea or stomach upset because of the natural sugars and acids. Offer just a small bit and watch how your cat reacts over the next day.