I guess I can chime in on this, I have Rough Collie who is great with the chickens. She watches over them when she is outside, some of the banties ride on her back, and they all follow her around. She has attacked (and killed) a raccoon (though I would not recommend sending a dog after one). They are generally good with children. Most of our property is not fenced and she stays very close, however, she does have storm anxiety (which seems to be fairly common with some of the collies I have met). I also have a Newfoundland puppy. If you are wanting a dog that does well with children, there is no better dog. She is still learning that chickens do not appreciate being chased around. At five and a half months I can trust her off leash, but I do still have to watch her. A few have mentioned Anatolian Shepherds, I would love one for guarding, but for playing with children I am not so sure. If you are wanting a dog just to guard the chickens then that is a great idea, but for a pet which will allow other children into the yard to play with your children I think I might steer away. No matter what breed you choose, training is key. My Newfoundland came from a breeder who had chickens, so she had seen them some. I introduced her, though the run, the day we brought her home. She seemed uninterested until I let them out of their run, at which point she went bonkers. It has taken a few months to get her to the point that I can put her in a stay and let the birds out without her chasing them. Biggest thing is to have fun with any new dog you choose, and make sure it is well socialized with all the things you are going to have it around for the rest of its life.