I suppose I may need to post a picture but I have some chicks that are about 2 mo. old all together different breeds, mostly japanese bantam and silkies, the rest are some younger standard breeds. My little Japs are missing neck feathers, only the japs are missing them everyone else looks fine. It's strange, they are only missing on the neck. I combed them over for a good while and couldn't find any other sign of bugs. I sat and watched and didn't even see one scratch...I figured maybe if it was some kind of pest they would be scratching their heads and necks. Could it be plucking or a pest of some kind? It's just odd that it's only happening to them and not the others.