Kohlrabi — Food safety facts
Safe to share · Cats · full breakdown on the linked food page
Peeled and cooked in small pieces.
Short answer
Yes, cooked kohlrabi is generally safe for cats with kidney disease, but keep portions very small. Peel it, cook it plain, and offer just a bite or two as an occasional treat. Always check with your own vet first, as they know your cat's specific dietary needs best. If you notice any digestive upset, stop feeding it and call your vet.