I came home from work today and had a dead chick in my brooder. I had only about 15 of the chicks in the brooder. Her lower back near and around her vent were all bloody. I buried her and assumed that they had a pecking war while I was gone. However tonight I notcied another chick kinda off by herself. I cornered her, got her out and her vent is all swollen and looks like leaking puss/poop. I can't tell. It looks read and raw. I decided to try and make sure there was no dried poop blocking her from using the bathroom. However everything looks clear. I inserted a q-tip just a lil to make sure. Any ideas here. I looked in a disease book but nothing. More info on them, chicks are around 4-5 weeks old. Only thing I did differently was alot them some scratch. Is it way to early...I am still pretty new here. I can get a picture if needed.