Dont know if this question belongs here or not but do you guys keep your chickens locked in the coop during very cold days or will you open the coop up and let them decide if it is too cold. Is it bad for the birds to not let them out at all for a two or three days at a time. and in the summer months when it is hot is there any need to lock them in at all could i leave the coop open 24/7??