Hi everyone, looking for some help. We have moved from CA to CO and have a new flock in the house getting ready to move outside. We are looking for any advise on an automatic chicken door that can hold up in cold weather. We got down to -7⁰ about a month ago for 1.5 days. Looking for any advice on a door that will still open in cold weather. Please let us know your choice if you live in these conditions. Thanks in advance.