you've heard about the cavy cop?

thanks british library (PD)

You're cruising through the Wellington area of New Zealand.  School's in session, so watch your speed:  if you go too fast you'll have to answer to Constable Elliot.  If you get caught, remember it's all right if you don't look him in the eyes, since that would require you getting down flat on the ground.  You see, officer Elliot is a guinea pig.
Mind you, this isn't a completely brand new concept.  Over at Cambridge's Ethology Institute you can sign up for scent-detection animal handler training at Guinea Pig Camp.