Hi everyone. I'm new to having chickens, so I have lots of questions. I would like to have some sort of "automatic" pop door on our coop, however there is no option for electricity to our coop and I need the system to cost me very little $ - I spent way too much on the coop construction. I've seen several options for "chicken operated" doors that use a pulley system using the weight of the chickens on the roost to close the door. This one was the most interesting to me - has anyone successfully used a system similar to this? If so, what are the pros and cons? I'm worried about shutting a chicken out of the coop at night or decapitating a chicken - I have one that refuses to join the others on the roost and she also likes to perch in the door if I don't get it closed early enough. Thanks!