i like the idea of putting the chickens back with the pup. the good thing about keeping chickens near dogs is the smell of the dogs can go a long way towards keeping chicken predators away (mongoose and cats).
as you said, just make sure that you raise the chicks with the dog such that the dog won't go crazy trying to eat the chickens. if you keep looking around this site there are some people who have some great suggestions for how to train your dog to be good to the chickens.
i'm heading up your way to shark's cove for some diving tomorrow. hopefully the surf stays down a bit longer.