We bought a German Shepherd pup, Bear, about a month before we got our chicks with the intent to raise him to protect our land and chickens. This has worked well for us. We have coyotes and the neighbors have dogs that have been accustomed to hunting on our land before we moved there. So far this has worked great. He watches over the chickens and makes sure they don't wonder too far. They are free range birds and have 11 acres to roam but stay on about 3 acres. We are adding electricity to our chicken house soon and will have motion detector light which should help. We plan to get another pup next spring when Bear is old enough to teach. He is still such a pup but takes his guarding as seriously as play. And is growl will scare anyone or anything away!