When a cat is tamed, it behaves like normal (aka Right clicking makes them sit/stand, they follow you, scare creepers, etc) but after saving and quitting from a world and then rejoining. They somehow are both tamed and untamed. They will sit on furniture, preventing use, but t the player cannot make them stand up and follow. Also, if one is standing and fish is held, it will act like an untamed cat and approach the player, but not run away when the player moves. Feeding works, too. But feeding doesn't put them back to normal.