Thanks for the answers Joe.
I don't presently have chickens. I had some about 5 years ago and will probably gets some again next spring. Our dog we have now I thinks is probably too old to bother a chicken, he would probably be scared of them anyhow. He's doing good, but he's 16 and we can really see him aging fast the last couple of years. We won't get a new puppy as long as he's still with us; he's not much of an Alpha. Point being, at some point I'll have a new dog to train to not kill my chickens.