Maybe my last sentence was a little mean (snarky me, sorry I have a migraine) but dogs view anything in their family as a part of their pack if trained right, they do not have to grow up with chickens to learn to leave them alone. Once your dog sees that your chickens are just as much family as he is, there should be no issues.
Pretty sure that most of us said that it can be done with HEAVY training. Wacking a dog in the head with a dead bird once will not cure it of chicken aggression.