Do a Search on cross beak or crooked beak on here and you will see quite a few posts and tips. I have a BR roo who was born with one and one eye. He does well as long as he has a deep dish to eat out of. I do handfeed him treats. When he was little, it seemed the food would get packed on one side of his beak in the corner and I had to pick it out, but not as much since he is an adult. Start filing the beak early on a little at a time so they get used to it and tolerate your doing this. It is usually a skull deformity.