Mouse Footprints

A few days ago I heard rustlings coming from the kitchen cupboard, so last night I had the idea of sifting some flour onto the floor in the vicinity to monitor activity. This is what I found this morning which confirms we have a mouse problem. I've been looking for humane traps online as I don't like the idea of killing them; in my local pet shop this morning they said they'd be getting some mouse traps in which would 'blow their heads off'. Yuk, I won't be buying any of those.