My chicks (about 9 weeks old) have been in their coop and attached run for about a month. Today, I decided to let them wander around our yard. I have about an acre, but we're bordered on 2 sides by park. Their coop sits at the very back of my yard, just in the tree line. They had a BALL in the woods today, and even came back in at dusk. Score! Here's the real question though; how far will they go? I know I'll need to put up an impromptu fence between me and the neighbors, but do I need to worry about them going the whole way to the road that's about 100 yards from the coop? Any words of wisdom?