Very mouseterious

We caught another mouse overnight. Out it went onto the porch, still in its trap, to be dealt with after breakfast. Problem was, something else decided to deal with it first. The Man found the trap out on the snow of the front yard, opened and empty, and no mouse to be seen. Could a cat have got to it? Maybe - in which case the mouse was breakfast. But the part of the trap with the peanut butter bait on it had also disappeared, so I'm not discounting squirrels. In which case the mouse could just have done a runner and be back in the kitchen tonight. Sigh.