I went out to check on the chicks in their outside daytime play pen and I noticed on of them has a black beak, I looked back at older pictures of her (she is only 4 weeks old so its last weeks picture lol!) and it was black then to, but not nearly as black. Is this just part of the growing process? One other has a slightly dark beak but not like this one. I am adding a picture of her. I may just be overly worried about all the babies since we've never had chickens before, I would just hate for something to be wrong and I not know. Thank you! I apologize if I put this in the wrong category, I was not sure which it should go in, but figured shes a baby still so this is a good start.