We bought our chicken coop a week ago and moved our chicks into it on the same day. The coop has a vent in the back with a wire over it that has a door to open it and lock it and also a sliding window in the front with normal window screen. I'm a little too nervous to leave the window open during the day or night since I don't know if the screen is strong enough to keep predators out. I know the chickens need good ventilation but I've been so worried that if I leave one of the vents open at night that a predator will break in somehow. I have been closing and locking everything up each night and then opening the door to the back vent during the day everyday. We have coyotes, foxes, racoons, cats, hawks, etc in our area. Will it be ok to leave the back wired vent open during the night also? I'm not sure what type of wire it has over it but it feels pretty strong. I'm not sure if we should add some additional hardware cloth over it to protect them more so that the slots would be smaller. I want to make sure they are getting enough ventilation but also want to make sure predators won't break in and that it won't get too breezy. See below for pics. Thanks!