Kale — Food safety facts
Safe to share · Cats · full breakdown on the linked food page
Safe in small amounts, steamed is gentler. Contains calcium oxalates — skip if your pet has kidney issues.
Short answer
Chewing on a small piece of raw kale is generally safe for cats. Kale contains compounds called calcium oxalates, which in very large, frequent amounts could contribute to kidney or bladder issues over time. A single, small nibble is unlikely to cause any immediate harm. Just wash the leaf thoroughly to remove any dressings or contaminants. If your cat has a known history of kidney problems, it's wiser to avoid kale altogether and stick to their regular diet.