Remember that any dog can be different than "the breed" expectations. The Cavalier on my street is named Jasper - and he loves to (try to) chase slow-moving cars. Odd, and could be dangerous, thankfully everyone on the street knows about it, AND he's always on a leash and usually gets picked up when cars approach. I have never, however, heard him bark.

Just keep visiting the shelter - you never know who will capture all your hearts!

Certainly I'd reccomend a full-grown dog of some breed, to eliminate the troubles of puppyhood - yappiness often being one of them!