I do not have a dog, so i have never tried this. but if you are having trouble getting your dog to accept the chickens i would suggest going to this website to train your dog:
i have watched this video and it seems to work with dogs. but remember, before you get chickens it is a good idea to ask a friend or neighbor let you test your dog on their flock first to see how your dog reacts. keep your dog on a leash when doing this! if your dog is very aggressive, either don't get chickens or make a very secure coop/run to keep your dog from attacking them. but try the training video too!