I'm so tired of mice and sparrows. They are all over the place here in Utah. I will be out there taking care of the chickens, and the mice just look up at me like they are saying, hurry up, I'm hungry. They won't even move until I move toward them! So, found this trap. They go in for the PB, the step goes down when they go in, then pops up when they step off. I caught 5 last night..put it somewhere else this afternoon, and went out to find this little guy. I have it in another spot now. I need another one. The mouse at the top of the trap..the big blob of PB in the middle. I want to make sure they can smell it. They can! This is the doorway on one side, there is one on both sides. The smell in my end pen is so bad, smells like mice. And it's an open coop/run!