On Friday we rushed one very sickly chicken to the vet with a prolapsed vent. She was given shots and antibiotics and we were told it wasn't contagious. All four chucks are currently molting so they are pretty shabby looking anyway at the moment. However on Sunday one more laid a massive egg and that evening one (I'm assuming the gigantic egg layer but not sure) was bleeding from its very sore- but not prolapsed vent). We assumed it was just due to a small tear that had been pecked by the others so we separated her from the rest- bathed her in salt water and covered her cage, reduced feed to stop her laying. Now however i have just found in my never empty run that one more chicken is bleeding- definitely been pecked by the other chicken that is in the run with her- we put corn flour on the wound to stop the bleeding but now she is bleeding again- from the vent. Any ideas as to what it could be or what more we can do? The school has had them since September and never had any problems until now. They have all been laying since December but have been erratic since they started moulting two weeks ago. All suggestions greatfully received!