I once had a coon roll a trap 75' across the lawn. He was so big that he could go part way in to eat the bait, then when the door slammed down, it would catch him on the butt, and he'd just back out. We extended the length of the trap with 1/2" hardware cloth. After he got dizzy from rolling in the trap, he shredded the hardware cloth and made his exit. Don't believe it when folks say that 1/2" hardware cloth is predator proof. Desperation and determination overcome many obstacles. Since that episode, I always peg a trap down to the ground.