TEd, many people were fooled by the dog entry, which if it was an intentional twist on the *actual dog crossbreed called a puggle was really stretching the spirit of our game. OTOH, I think only Milo voted for M, but that def'n also closely relates to yet another actual definition of puggle given by M-W unabr. two of these "coincidences" in one round just struck me as.. extremely odd.
I also noticed a site which claimed 
puggle is not a proper name for a platypus of any stripe.  [edit: it's the top hit]