My sister recently raised 26 meat chickens for ed tech (a school program) and we couldnt help but keep a few. Well slowly 1 by 1 the ones we were keeping slowly started to get sick and die. Well the last one that got sick had a crooked neck and we were just keeping it alive by feeding it and giving it water cuz it couldnt do it itself. I am very lucky to have an aunt that is a vet tech. The vetrenarian there is a very nice lady and has helped us so much like doing research to cure my pet toad and later putting him down, they have helped my mom and our dog so much they saved my dogs life because she had pancrientitis (sorry for my spelling) and almost died but they took extra good care of her. Anyways to get back to the chicken, we felt like we were keeping him alive for our own sake hoping he would get better and we were afraid he was suffering. So i called my aunt and ask her if they new how to put him down, she said they would happily put him down for us ( which obviously i took that option) or there is a VERY humane way to do it at home. Before i tell you how, i am telling you this because i just read a thread that had some pretty cruel stuff on the for putting a chick down. The vetrenarian said that you take a black garbage bag and you set the chick inside of it, then you tape it to your cars tail pipe and turn the car on. Depending on how old it is it should take anywere from 5-10 minutes maybe a little more. This is just as humane as putting an animal down with a needle at the vet. It just makes them go to sleep. This method also works for an animal that has been hit on the road and is still alive yet suffering.