Over the years we have had wire crunchers. I have used bitter apple and booby traps. The traps are easy, just a few pennies in a soda can, then tape a strong thead to the can and tie it to the wire. Set the can near the edge of a table or something high, BINGO when the wire is moved the can will fall. Great for when you are not home. Just make sure that the thread is tight between the can and wire. No one chews in our house. Toys only.