But it's not living there but being transported in it. Hamster (and gerbil) cages have wheels and balls in them!
Actually I went for Guinea pig on the grounds of the markings. Those colour divisions look like the puinea gigs we used to have when I was a lass (between 9 and 14!), they don't look like the vicarage hamsters (or was it gerbils) from Aber.