Too many times the bait was missing with the door opened or closed. Trip plate not sensitive enough for chipmunks. Tried to put rocks on plate, still no luck. Even tried to put magnets on the door for extra weight still trap was empty with bait gone and the door open.Amazon was great they took back the traps for a full refund, there return policy is the best. I am going to purchase havahart 1025 and see if the do the trick.