Hi my name is Jerry . I live in Clyde, TX. Just outside Abilene. I am new to raising chickens. I am buying my 1st 25 in early Febuary. They are going to be totally free range. The coop I have is 11 ft. by 12 ft and is solidly reinforced. Also plenty of warm raised cubbie holes and warm out of the wind places to nest. My question is do i keep a chicken door to the coop open all day so they can come in at night? what about cats or something getting in that chicken door during the day? They wont be fenced in and there is virtually no dogs at all aroud just a few cats. So if I leave the chicken run door open during the day wont other animals get in ?