It's a Griffon Bischon. We have one, and that's a thousand dollar pup you've got there there. Next opportunity, lock it up. They're pretty defenseless wandering around. And best check for a micro chip. There's probably an owner looking for it.
Here's ours, Ebony.........
(http://members.socket.net/~mcruzan/images/Griffon%20Bischon1.jpg)
Ours was given to us by the breeder rather than put her down. She didn't have the right under-fur, and wouldn't be sellable. She was about the size of a couple packs of playing cards when we got her. Now she's full grown, and the size of an average house cat.
The breeder get $1,000 each for them.
(http://members.socket.net/~mcruzan/images/Griffon%20Bischon.jpg)