I have a Golden Retriever who is also our hunting dog. She loves the chickens so much.
When they were hatching, I had her watch them and then I let her sniff each one. She would go downstairs to the brooder and just lay down by the box (she never goes downstairs).
Now she sits by the chicken coop on her "post" and "guards" the coop!!
There was a chicken hawk sitting on the coop one day and she sure did let us know!
And yet if she saw a chipmunk, mouse, squirrel, anything she would want to kill it! It's really weird because when I had my hamster she loved my hamster too. Even though he looked really similar to a chipmunk, I could leave my hamster and my dog alone in a room, come back and ask my dog "Where's Peanut?!" (hamster's name was peanut) and she'd find him for me!
I think golden retriever is the way to go for a family pet, hunting dog, and chicken guard.
Oh, and I also believe just sitting your dog down by your chickens and letting them sniff the chickens and telling your dog that they are family not food is the way to train. Also, hug and snuggle the chicken with your dog watching to show her that they ARE part of the family. Then when the dog behaves, make a big deal and give the dog lots of treats.
That what I did.