I am no expert but I do have a baby grey. I have had her for two months. Baby greys use their beaks all the time, they are exploring, reaching out to see what something is like. I just tell Ana Grey, "No bites," sternly but no yelling and just distract her. Talking to her calmly. There is an article in the April 2009 "Bird Talk" Baby Beaks, Young Parrots are Guided by Their Beaks. Perhaps that article will help you. Good luck.