I have 15 layers and a rooster. I have a nice run for them. The only thing is it is not covered. We couldn't afford to do that yet this year. I live in a small rural town but still in town. Some of my chickens have started flying over the top and proceed to take off all over. My rooster goes out sometimes too but unless the girls are out I can get him right back in because he is afraid of me. Is there anything I can do short of covering it to discourage them from flying over until next year when I can fix this problem? I pull grass for them, give them treats I just don't know what else to do. Can I tie anything to the top that would flap that would keep them in?