My bottom wire is fairly close to the ground. I have had possums, foxes, coyotes, skunks all at one time or another either dig under the fence. I went with the wire because of the large area I have and the wire was a cheaper way to go for me. At first I wanted to put up the electric poly poultry fence but it was only 4 feet high. I have a friend in the clam business who orders chicken wire by the trailer load and will order extra for me and it was much less expensive to go that route and my wire is 5 feet high.You would rather go with the single wires instead of the poultry squares? Wouldn't the poultry squares be better for diggers?