With mine it was playtime, apple twigs, and treats. He also loved to bite my dogs if they poked their noses through the cage. He hated when his cage changed. He lived 20 years and outlived several cages. He would chatter and bark at me like I had done this horrible thing to him. It didn't matter that the new cage was bigger and better. He got over it by the next day, but he let me know what he thought of it.