We recently moved to a property with 27 apple & 8 pear trees. They haven't been sprayed in years, and are mostly pretty buggy. We won't be eating them this year, but would like to save them for our cows/pigs. There is a brick storage building on the property that was supposedly previously used to store the fruit. there are 3 levels of wire mesh shelves. I imagine I need to line them somehow or the weight of the fruit will press into the wire. That's fine. But how to I keep the fruit flies out??? Also, it doesn't have a door, so we need to build one. Should it have some ventilation, or no? We are in the PNW, so it will be cold, but not super cold. Vancouver, WA area.