>>192988i'm gonna go ahead and support OP on his proposition. if you're catching rodents and squirrels and such for food there isn't a great way to kill them anyway, at least not any better than one of these knucklebreakers here.
yeah you could try to shoot them but that takes time and luck you can't spare, and any other trap or snare you can make isn't going t be as reliable, or humane.
the only thing i would have to recommend, between the two traps (rat and mouse) is that you be very careful where you set them.
mice and birds and feast all day off a rat trap without setting it off, and squirrels/chipmunks/bunny wabbits will be maimed but not killed/almost def escape a mouse trap.
also your tether idea is splendid