Brand new chicken owner .... I have 2 Road Island Red , 2 Sex Links and 2 Sultans...one turned out to be a Roo! My little Female Sultan seems to be shunned from the rest of the group lately.... They tolerate her from a distance but peck at her if she gets to close.....( they don't seem to be picking on her out of meanness that I have observed)...... she has been very docile when picked up....which made me notice her beak while I was petting her .......the beak looks hard and normal at the tip...but midway back to her what I call her forhead(comb area)...it looks as if it is just being eaten away??????? ...I have book with some diseases in it but nothing on beak problems other than trimming! Help any ideas??????