Minecraft wiki entry for Advancement_guide, associated text: You will need at least half a stack (but preferably a stack) or either raw salmon or raw cod, usually obtained from fishing. You then need to use it to tame all 11 cat variants in the game. To tame a stray cat, you have to hold the raw fish in your hand, then slowly approach it. Cats will flee from you if you get too close or approach too quickly, so sneaking toward it is a good approach. Eventually, the stray cat will start crawling slowly toward you. Once it comes to a stop in front of your feet, use it with the fish several times until red hearts appear on top of the cat, showing that it is now tamed. Each cat variant has a different appearance, and a different name. They are: Black, British Shorthair, Calico, Jellie, Persian, Ragdoll, Red, Siamese, Tabby, Tuxedo, and White. Once you successfully tame all 11 cat variants, you will be awarded the advancement.