I keep rat/mouse poison in my outbuildings away from the house. My backyard is fenced behind my house. My Mini-Pins killed a Rat playing on my deck this summer--then, on my night cameras, I watched another one play around, was carrying apples to where he had made a hole under house. I set a trap, caught him. I was always under the impression that where you saw one-there were many more. Its been several weeks, I havent seen any more on deck or back yard. I hate to put bait under the house, afraid of secondary poison. SO--what do you guess?? Have they moved out? So I can close their access now?