If you ever look in old barns that have been there before the Great Depression (few but there are some) you will see rat traps with holes drilled in them. They

If you ever look in old barns that have been there before the Great Depression (few but there are some) you will see rat traps with holes drilled in them. They were used to hang on trees to trap squirrels. Apparently this worked well the first year...not so good for the decade after that.