Heres what I have done for a while. Thread some wire threw apples, spread peanut butter on them then tie them to the top of the trap. They will have to wank on the apple which will end in them moving around too much in the trap and it should setit off. Its worked for me before. I live in the city with a good size lawn and a tree line running behind my house. Squirrels are everywhere. I kidd you not I've been living here for about 1 year and have killed over80 of them. I'll shoot one and the next day there will be 3 more in the yard, and this will continue on and on. The most I've seen in one day is 8, all chasing each other. Well just today there were 3 in the yard.