These are interesting things I've found on the internet.
Mouse Sighted Aboard ISS
Mouse Sighted Aboard ISS: " Editor's note: Look at the extreme upper left hand corner of this image: 'ISS012-E-08727 (16 November 2005) ISS crew work at the Simvol-Ts / TORU workstation in the Zvezda Service Module of the international space station during onboard training for relocation of the Soyuz TMA-7 spacecraft.'. Mickey has been on orbit for a while. You can see him velcroed to the wall in this image - between the fire extinguisher and laptop - during expedition 11."