HI Folks- I have 2 out of my 12 Chickens who look as if someone plucked the feathers in an oval patch on their lower backs right where their tail feathers start. One has had this for a while- no signs of mites, or bugs -we had been applying neosporin to area and new feathers are starting to come in-now one of my black astralorps is all plucked in the same area. (no open areas-intact skin). Any ideas? We don't have a rooster- birds are in coop/run during day and get an hour or so of free ranging in evening. We use layer feed with table/garden scraps. Thanks for any info/ideas!