Not to throw the thread off but cross beak can be a genetic defect and other beak deformities. I don't see why this isn't either. As I stated before these birds had longer beaks than the others when they were small chicks. I know for sure that one of them hatched from a pullet egg. Anyway ... I looked closely at them today and it looks like I can only trim about an 1/8" off before I get into the sensitive area. I'm a bit afraid to try.