My first line of Defence is the dog's kennel area. The city wouldn't allow me to put a 6ft fence on the side of my property. So I had to go with a 3ft. But never the less. The Doggy land mines are there. Now from time to time we do remove them. But seems an endless task. The main gate just ahead. We lock it from the inside. a key lock. So they'll have to climb over.