When I bought Gizmo I was told he was purebred but he just didn't look like all the other yorkies. We think that he's a Chorkie mix but we're not exactly sure. Especially bc the hair on his face wasn't growing out long like other yorkies around his age, but now that he gets older I think he looks more and more like a yorkie---but with a chihuaha's attitude! I don't care either way bc I think he just soooo adorable