We have a black lab. Our fella lived with with our chickens since they were 1 day hatchlings. We did all the things they say to train him. We let him be around the baby coop, then in the yard with a leash when the chicks were big enough to be outside, then work in the yard with us and chickens...
My red sexlinks committed chicken suicide. They flew over the fence and ate morning glory seeds from the dead vines I pulled. They died in less than 24 hours. :(
Be careful what you plant, especially if your girls are family pets!