One of my 2 week old buff Rock chicks is bleeding and the other chicks have been pecking at the bloody spot. I'm not sure how she got injured but it looks like part of her tail feather broke off and started to bleed. Then I'm sure the others started pecking and making it worse. I have her isolated in a box but I'm not sure how long I can do that. I'm using the "mama heating pad "system mentioned in this site so she won't have a good heat source in isolation (I could put her near our wood stove ). What should I do about her injury? What could have happened? Thanks!