Bison — Food safety facts
Safe to share · Cats · full breakdown on the linked food page
Safe cooked and plain, like lean beef.
The full verdict, portion guidance and serving notes are collected on the Bison food facts page.
Short answer
It's safe. Cooked, plain bison is fine for cats just like lean beef. Check that it was served without any seasoning, onions, or garlic. Offer your cat some fresh water and watch for any unusual stomach upset. If you see vomiting or diarrhea, call your own vet.