First time pigeon owner. I built my own loft. I plan to fly these birds as much as possible, but wanted a large aviary for them in case I am too busy for some days and cannot fly them. I was told by the guy I got my birds from that my aviary opening is large and will be drafty and make it such that they will not use the nest boxes adjacent to the opening, which is like 3 of my 8 next boxes. I made the opening this big because I thought ventilation was very important, but did not think about drafts. I still have the cut out piece (you can see it sitting there in the loft), and was planning on making that a storm door for bad winter storms, but I am now thinking of just affixing it back on and cutting out a hole for the aviary opening that is much smaller? So, do you guys think this aviary opening is too large, and, if so, how small should I make the opening? Thanks!!!