If it was purchased in 2185, the Space Hamster can be found scurrying around the Engineering deck of the Normandy in the same general area where Jack used to be. If caught, it returns to its former spot on the shelf in the Captain's Cabin and behaves identically to its 2185 incarnation from that point onward. If Shepard took Dr. Bryson's Husk Head Experiment during the events of Leviathan, then upon interacting with the Space Hamster's cage the head may look up at it and scream.