I have 5 1-year old hens and 4 19 week old pullets. This is a pic of my 1-year old Orpington's legs. They've all been raised on my property from a day old. However I just bought this house last summer and the hens came with the house. I can't recall if they looked like that when I moved in or not. They don't seem to be getting worse. I have been using DE around their coop and they come out a few times a week and take dust baths under the deck.