My parents' yorkie and my sister's yorkie will run, but my 2 and my grandparents' yorkie will not run. However, when my parents' yorkie, KoKo, runs, she always comes back. She runs down the street, checks things out, and comes right back. My 2 will run if they see someone that they think wants to play with them (which is they think is EVERYONE) or if they see another dog. But, otherwise they stay right around me! I guess I'm lucky!
