We string the mouse traps so that when one goes off it causes a chain reaction. We once rehomed a yellow lab that could get into anything . She could open cupboards, the fridge even got into the freezer. We offered to take her back but the new owners loved her because she would transfuse blood for their older lab. Anyway the mouse trap trick worked. At the end they didn't even need to be set just near the area that Nala was not to get into. Unfortuneately she was too smart for her own good. They left her at a boarding kennel and they did not lock the doors properly. Nala opened them and got out and was hit by a car.