We purchased a Yorkie male 3 years ago from a local gentlemen, claimed they were pure yorkies but no papers. He said the only male would be big like his sire, probably get up to 13 pounds. No problem with us, we love him. But he's huge, 16 pounds and now we're wondering if he has a mix of something else in him. The gentlemen isn't around anymore so can't go back and ask. I'm enclosing pictures of him, what do you think? He's 3 years old.