Well, I guess I'll have to "dummy this down" a bit. I said that no SERIOUS dog trainer would use cots to train a dog. Since a trainers goal is to train the dog to hunt what it will encounter in the field, that would be bobwhites, not cots. Cots do not fly or flush like a bob, so training a dog with cots can only teach him bad habits that will hinder his ability to "work" the "real birds" in the field, where it counts. If you were training a dog to hunt cots, then cots would be what to use to train the dog. If you were training a dog to hunt rabbits, you wouldn't use a kangaroo to train him. If someone is buying cull cots to train his dog, he's not much of a dog trainer, but he is valuable in the sense that he actually pays someone for their junk birds to ruin his bird dogs. The only similarity in a training sense, between the cots and bobs, is their scent. This is where the baloney sandwich comes in.