I'm having a serious problem with chickens trying to escape. Every time I open the door they all run up and crowd around the doorway, shoving past each other and trying to get out. I feed and water them regularly so there not starving or anything. There not super healthy though because this is my first flock and I'm trying to improve on there living conditions. Its starting to get extremely difficult getting in and out and I'm starting to have to slip in while there roosting just so that I can give them food and water and collect eggs. By the way I've tried distracting them with treats and stuff like fresh grass, and I've tried scaring them away from the door with an umbrella or plastic bag, but they won't budge. Is there some trick or something to get them to stop?