So where does one buy the plastic wrap stuff for the runs? I have always wanted to try wrapping the runs in plastic (the sides only) to prevent some of the nasty wind from barreling down on the coop in the winter months...we frequently get 40-50mph blowing snow and sub-zero temps. Last year, I made little "curtains"out of heavy canvas and put them over all of the pop holes. This prevents some of the wind from entering the coop and some of the blowing snow from wetting the shavings...but I'd like to do some more this year. The coop is like Swiss cheese with pop holes all around! I will need A LOT of plastic.... I looked at the painter drop-cloths yesterday at wal-mart but they'd be shredded in about 2 minutes....as they are way too thin and I'm not sure how they'd attach to the runs?