I've got one chick that keeps scratching at his neck and now has a significant bald spot on the back of it. The chicks are a bit over 3 weeks and I bed them in wheat straw, give them chicken starter feed, water them and include vitamins/electrolytes in their water. At first I though maybe mites, but none of the other chicks exhibit this behavior. Out of twenty all in the same brooder and same conditions this is the only one behaving this way and having this problem. At first I also thought maybe another chick was pecking his feathers off, but they really don't seem to be pecking each other at all. I tried to cover it in vaseline thinking if it was pecking it would stop, but that only increased the scratching due to irritation. Any ideas? I'm kinda worried about it. It's been getting worse for almost a week now and really don't have any ideas on what's wrong or how to fix it. Oh, it's not bleeding yet, but it's red and puffy and probably won't be long before it does bleed. Help . . . . . . .