Picture this, the year is 2017, 6:30 pm and you have just put your eight 9-week old ladies into the coop for the night. (they have only been in the coop and run for five days now) You leave a small gap, inch or less open at the top of the hatch, with it latched. This morning you are awakened by your hubby saying "I don't want to alarm you..." Ummmm, how is that opening phrase not alarming? ALl eight of your chickens are out in their yard, the hatch is still latched and the main door is bolted. Is it possible for 9 week old chickens to get through a less than one inch gap above a hatch door? I have to assume they were out most of the night as when I did unlatch the hatch door they all went in straight away and stayed.