That is exactly how Nikki got all of her nicknames! LOL! We first started calling her Nikki Doo, because she was in love with Scooby Doo. It has now morphed into:
Nikki Poo
Poopy Doo
Pooper Doo
Poopers
Poopy Puppy
Snicker Doodle
Nickers
and just plain Doo.
We also call her Boxer Girl and Pretty Puppy.
It is hilarious because people come over and we call her all these names and they give us the strangest looks. I have no idea how we ended up with so many, ecspecially the ones involving poop.