Couple of questions Sherman
Is it still eating?
What if anything have you tried up until now?
Do you have a picture?
Do you have any ideas as to why this occured?
Warm shellow bath for 10-15min and a couple of drops of vegitable oil on the nose for 2-3days is a good start continue to feed if they are still eating. If it is still eating there is other things that can be done if the bath dosent work that I have used and can fill you in on if you need too.