I posted about this in Pics and stories. My 4 yr. old German Shepherd chased down and killed one of my new chickens at his first opportunity. He has only been with us for weeks (rescue), and hasn't had much in way of training by us yet. Normally, he listens well and comes when called, etc. Once he took off after the chickens, he totally disregarded me and it wasn't until after he had caught and killed the rooster that he would listen. I told him to kennel, which he did. I was then able to go get the dead chicken from him. I need to have complete confidence that when his is told to do something (or not do something), that he will immediately do it. If I can't, then he is much more of a liability than an asset. As for the chickens safety, I have built another fence 5' high to keep him out, but I don't trust him when I am gone. I will keep them segregated by any means necessary until such time as I am confident he is not going to kill more! What is the best way to teach the dog that NO MATTER WHAT, when I say "Come" he should forget everything he is doing and immediately come to me? Thanks!