Don't get discouraged. It took me at least a year to get my 34 year old Amazon to move to a pelleted diet. He was born before pellets were around. My vet told me to crunch up puppy food and give it to him. I can't tell you how many pellets I threw away before he would eat one. Eventually, it worked. Keep trying and keep talking. Go up to his cage and whisper to him. Say anything that comes to mind, but keep it low and calm. He will become interested in hearing you and will move towards you to hear. Keep talking and giving treats. Over time, he will warm up to you. It is all about trust. He must trust you not to hurt him. Only then can you begin a relationship with him. Good luck.