what do i do with beak????

Well today I found out why my new blubelle has a bit of her beak missing!, she is very flighty at the moment and the other girls only have to make a move in er direction and she throws herself ANYWHERE!! after a bit of a scuffle today I noticed a bit more of her beak haning off (looked just like when you break a nail!!!) I snipped off they hanging bit but noticed it has gone quite a way back and could see alittle (tiny) red bit! will her beak repair itself? and do you think she has lacked something in her diet that has made her beak weak? if so is there anything i can give her or put on it??