You know rats are truly smart critters.Back when we had so many of them I had 10 traps set and caught not 1 of them.They would be sprung sometimes but I never caught 1.My wife even got a pic of one on our back frikking porch during a snowy day.I asked her if she had time to grab a camera why didnt she take the xtra step toward a shotgun.To ****** with opening the window either!