we've been raising 11 chicks we ordered through our mill store, mostly brahmas. When they were getting big (3 weeks) we separated them into two bins. One at the time seemed to be pink around her the back of her neck, so we put her in with fewer, calmer birds. Her neck has progressively gotten worse and today looks bloody. We put neosporin on it last night, but it just seems to be getting worse. No one seems to be pecking at her, and everyone else looks very healthy. Does anyone have any ideas what this could be and how to help her? Thanks for any comments..