All of the top of my chicken run is made of chicken wire. I need a permit to build a full roof out here in Colorado and do NOT want to deal with that. But everyday I look out the window, there are sparrows going nuts in the run eating scraps because they are so small they fit right though the holes. . Should I worry about them hanging out with the chickens? The chicks dont seem to even care what so ever about them being around but I do. I keep reading about not letting wild birds around your flock, but what about the people that have wide open acres that their chickens roam on?