Dude, think about it, he'd be great! It might take him longer to get there, but rats are clever and sneaky, so he'd probably be sure to stay out of sight and not make a spectacle of himself!

[If there seems like there's a note of admiration there, there is. Isabel likes rats; her grandfather probably still has a colony at his lab.]

I mean Chaos is equally smart, like most familiars, but you can't miss a cat the size of a German shepherd trotting across campus, you know?