I have a small group of 3 partridge Plymouth rock hens that have been free ranging on my back lot for the last 3 years. My neighbor just got chicks and plans to free range his on his small backyard adjacent to ours. We have no fencing. My chickens always stay near the house but I am concerned they will not get along. He isn't sure what type of chicks he bought, he said possibly Rhode Island reds. Should I just build a fenced in structure?? I don't want my girls hurt by the new one's. Any suggestions??