If you have a rabbit trap try putting a blob of peanut butter, just behind the trigger flap, with a couple of hazel nuts stuck in the top. They can see it, they can smell it, and they can't resist it!. I use fat balls as well, some times you get magpies with them. Last year when i had a fat ball in there i came out in the morning and there was a black bird in there. He was flapping around,and a bit upset, as i let him go .Every morning i would come out and there was this bloody black bird just sat there waiting to be let out after eating his fill of fat ball, come the end i would open the trap