Yep, you're right they're just dressed up rats. Today in the studio we thought we had to replace a quarter of the studio's insulation but after ripping off plywood our worst nightmare was realized. The rats with bushy tails had completely destroyed the other front section of the studio. The plywood has been nailed up with a power nailer so it is not a fun job. Once you get a good hold on a piece you are covered with chewed up fibre glass.