A well built, natural looking tunnel is often enough to catch squirrels without even bothering with bait
If you look at my video, you'll see that I lob a few peanuts down just to add to the appeal of the tunnel
Peanut butter is often used as a bait for squirrels because it's got good scenting characteristics and squirrels seem to go for nut based bait more than most other stuff. Rats and mice also like chocolate
The tunnels I've been using recently are based around a simple three sided piece of 2x2 weldmesh. I use that as the basis, and then build the tunnel around it using na