Here's a picture of my dogs with my chicks that are about a month or so old now. (He didn't corner them. The chicks are just snoozing there.) I have raised chickens with five different dogs now, all with great success. With supervision and training, they can live together.
http://i244.photobucket.com/albums/gg36/sunniten/Macandchicks.jpgHere's another picture from a number of years ago. The big dog on the left has since died of old age. Both dogs were fine with our chickens and wouldn't even look at them when the chickens walked by.
I've heard "If a dog tastes blood, you can never train him not to kill chickens." Untrue. The dog on the left was a wolf hybrid that had busted through a weakness in my coop. This was (obviously) before he was totally trained. (Those were our first chickens ever, so we were not trained ourselves as TEACHERS in the dog/chickens ways.) We came home from work to find him with a dead chicken draped in his mouth.
After that he never touched another chicken. He lived peacefully in the same yard with them. And no, our training tactics were not brutal or cruel. They just involved a lot of supervision, praise, and rewards. Our dogs were never hit. I've never understood the mentality of tying a dead chicken to a dog to prevent it from killing again. It makes no sense to me.
I think a lot of it depends on the relationship one has with their dogs as well. If your dogs are constant yard dogs and not a true part of your family, it will be more difficult, in my opinion. If they're a true part of your pack, they'll want to please you.
http://i244.photobucket.com/albums/gg36/sunniten/MonteKimbaChickens.jpgAlthough my German shorthair mix in the top picture is okay with the chicks, I still supervise him. He's completely used to our hens and pays them no mind, but these chicks (only recently old enough to be out of the coop) are a novelty to him. He REALLY wants to play with them, but he is supervised and praised when he minds his manners. He wants to please me, but it will take a few weeks before I would completely trust him alone with the chicks. (Our black Lab mix, the bottom dog in the other picture, has no interest in the chicks.)