I am new to chickens and am setting up a run for then on the side of my house. Two sides of the run will be a block wall the third side will be my coop. I am planning on running a chicken wire cage along the 4th side and the top of the run. My question is: We have Coyotes, Possum and racoons in the neighborhood. Is chicken wire strong enough to keep them out? They can not dig under it, but my husband says they can tear through it. Any experience or advice out there? Should I use a smaller heavier wire?