Those things used to get (probably still do) into the switchboard where I worked. They would squeeze through the security grates on the cable trenches where they came into the building, and follow the cable trays in the basement and up into the switchboards. I often would be passing a long night, alone in this big building, and something would make a some sort of sound behind me; it was always a bit startling, but after I figured them out, I'd check to verify, and call the dog catcher - that was company policy. Made otherwise often boring night shifts interesting. Bad part was when the stupid things would commit suicide by getting into a hot buss and frying their dumb selves; that really made for an interesting evening.