Same old dog, no new tricks
In fact, he has waged war on his leash and does his best to tear it to complete shreds every opportunity he gets. I can only imagine a similar fate would befall any decoration I attempted to put on him.
Secondly, he is not on his best behavior when in the confines of our home, so I seriously doubt he would change his ways should he be allowed to actually venture into public. Any canine that is around a large number of other dogs, animals and people should possess a modicum of decorum, which my puppy clearly lacks.