My chick is about 2 weeks. She was cleaning under her wing and it looked like she had wound. When I looked closer there was no injury, but the fuzzy fluff she still has looked matted. It feels kind of hard like it was wet. This is my first time with chicks. I have 4, and they are in a large plastic tote brooder and using pine shavings for bedding. I add a fresh layer every 2 days. Could they have mites? Should I set up a dust bath? If so, how should I do it in the brooder? Any advice would be great! I love my girls and don't want them to have any issues! Not a great photo, but the best I could get.