Hi all! I am new to the chicken world and got 5, day old chicks in the mail last Tuesday. My strongest and largest chick, Harriett (a barred plymouth rock) suddenly has some hard substance on her wing. I was wondering if I should use some warm water and try to soak it off or if this is normal and if I should leave it alone? All of my chicks pick at themselves and kind of itch themselves, but not like constantly. I just assumed they were pruning, but am now wondering if this behavior is normal and if it may have caused this wing issue dear Harriett is now having. I cannot identify what the substance is on her wing. It was quite hard to get a photo, but I did the best I could. Any help will be greatly appreciated.