My Lohman Browns are a week old. Tonight after dinner, I noticed that the tip of the top beak has broken off. There is no blood and it is not to the nostril. However, the bottom beak on the tip has a brown coloration to it. Also her sister has discoloration on the tip of her beak as well, it kind of looks like a fingernail ready to peel off. Is this normal for this breed. My other 2 chickens do not have this happening and they are about a week older than the browns. Any ideas? Will the broken beak grow back?