I have a chick who hatched with wry neck, and over the course of the past two weeks it's developed crossbeak. The wry neck is slowly improving since I've been giving a vitamin/mineral supplement. However, the crossbeak just began developing at 1 week of age and is getting worse each day. Is this a genetic defect? The sibling of this chick is perfectly normal/physically healthy. I already know not to breed the crossbeak/wry neck chick, but if it's a pullet, then I'll keep her just for egg production...if that even proves worthwhile. Even though the sibling chick appears normal, could it still pass on the crossbeak defect to it's offspring?