Hello! My hens will be on their own for a few days while I’m out of town and I have someone to check in daily, but she can’t be there in the morning and evening to open and close the coop door (it is always open throughout the year as our run is very secure, but I’ve been closing it at night in the winter.) If I am sure to wrap the whole run in plastic will that be ok if the nighttime temps are in the low 20s? All of my breeds are cold hardy. Thanks!