Nicki,

They do wear collars but they are very loose and the only reason they wear them is because a) on Maxx, it's something to grab hold of if he decides to go on a wander - he's obedient until he escapes but then he plays the deaf/blind card (as in I know you're calling me but I'm pretending I can't see or hear you ) and b) it's something to hang their name tags on! They get too hot to wear their harnesses all the time too.

I think I will email them and ask if they can make some harnesses though, they'd be quite a novelty