I have read that Quakers should not eat seeds only. Rio came to us on a seeds-only diet of cockatiel food. He is not liking the pellets or died fruit at all that I have offered him. I have added a few seeds today but he picked them all out and then didn't eat anything else. Do I need to give him more time to get switched over or is there some trick that I need to try? Do I still need to give him some seeds? I want him to be healthy and happy. Thanks.