While looking on line I found this product (Just Scentsational! Coop Scentry). "It's the humane and environmentally friendly way of ridding your chicken coop area of unwanted pests. Most backyard chicken people have trouble with animals, snakes, birds, and other pests raiding their chicken coop. The Coop Scentry is a scented protection stone keeps away weasels, foxes, skunks, rabbits, deer, squirrels, gophers, chipmunks, mice and other rodents. Place the predator scented Coop Scentry where you need the most protection from these pesky critters. For best results in large enclosures place one every 12 to 16 feet apart. The Coop Scentry is made of an all natural absorbent stone. Rechargeable scent is available when the Coop Scentry needs a recharge. Good for many months of outdoor protection". Does anyone use these already?? I am thinking to place them around the exterior of the coop to help keep critters away. Any thoughts?