I have an open loft -back and sides are wood sided but the front and the door are screened only. Attached to the loft is an aviary with wire cage sides. My question is this- I live in Georgia and the winters are generally mild with maybe two weeks of bitter cold in Jan-Feb. However there are variable freezes throughout the season from Nov to Feb. I have put plastic on the front (the wire side) of my loft and left the attached pen uncovered. I am worried I have made things too airtight. I leave access to the condo (what we call the aviary) so they do have airflow- I left a 6" foot long gap at the top of one of the wire panels- any suggestions or oh my God's that is terrible advice would be appreciated.