I live by the ocean in Canada where are winters are cold, snowy and damp. We often get rain and freezing rain. I'm wondering what people's thoughts are on putting a tarp or some sort of plastic on and around my chicken run. It's currently below zero at the moment with a few inches of snow on the ground. The girls do go out in the run but not for long. I want them to have use of their run as much as possible. Thoughts???