My hens have naked butts. There has been no decrease in egg production and they are eating and acting normal. Also the feathers at the bottom of thir backs where their tail feathers start look "fuzzy" almost like newborn chick down(sp). We also got 2 new roosters about a week ago and now one rooster has the same "down looking feathers" in the same place as the hens do. The hens were having this problem before the roosters got here. Any help would be appreciated.