My husband is currently in the garage working building our first coop. Our question is do we need to build a door for the entry into the coop? Our design is a house built off the ground with a run out the front. With the little ladder thingy leading into the coop, the entry, do we have to make a door? If so do you close the coop each night? We will have a secure run coming off the entry for them with an access door for us to get in to the chickens of course. My husband has cut out a door but did not think a door is necessary. is it?