There is an episode where Blue needs help brushing her teeth, cause she can't reach the sink.Among the clues that lead us to what she needs help with, there is a paw print (a clue) on the bathroom faucet.
Heheh.. that's pretty cool.... maybe Blue has a paw print stamper... because there are other things that she can reach and are clues... and who cleans the prints off? Steve?? I guess we'll never know..