I have an EE chick that developed cross beak at about three weeks of age. She is six weeks old now. The cross beak is minor but she does have trouble eating. She is only about half the size of her sisters. I’m going to get puppy nail clippers today and I already have a file. I’ve read up on all the causes of cross beak and how to trim them so I’m comfortable with that. My question is: If I keep the beak trimmed, is it possible for cross beak to cure itself the older a chicken gets or once a chicken gets cross beak is it permanent?