I'm modifying my Craigslist coop and am concerned about weasels getting through the gaps in the roof. The roof is beveled and made out of sheet metal, with regular gaps between the wood and the roof. I'm putting quarter inch hardware cloth inside by the gaps but don't think this is sufficient. Any ideas on how to best cover up these holes and keep out predators? Pieces of wood or duct tape maybe? Thanks! I've attached photos of the holes and my attempts to cover them as well as a picture of my chicks (because they're adorable).