That's either a very teeny-weeny lil kangaroo, Dottie, or it's one hell of a HUGE white mouse!
Either way, it's giving me a reeeal nasty acid-flashback, just looking at it!
(I am a child of the 60s, y'all
)
And I hope that mouse is just getting a piggy-back ride there! Don't want to think of what else he might be up to!