I'm new to the forum and new to raising chicks. Long story short I have 25 Cornish X chicks that re about a week old and all but one are doing well. The one that's not is currently separated because of a small open wound on his back. I think he may have got it from the others who might have pecked at him because of a build up of poop on his back. I thought at first the buildup was from other chicks but I was cleaning him and he did his business and it squirted up onto his back. The hole it came from is tiny and on his lower back almost at the tail. Any picture I can find on chicken anatomy would place the vent more on the underside of the chick and from the descriptions I'm reading of vents the vent should look like something more then simply a tiny open sore. Other then the constant dirt the little guy is doing fine. He's eating and drinking and seems to have lots of energy. He IS now smaller then the others. It just ocurred to me he may still have a vent underneath assuming I'm right about where the vent should be? On the bright side I'm learning a LOT about chicks in just the first week.