The weight of the parents isn't the truest indicator of how big the pups will be. You would have to know the history of the sizes on both lines. My big boy was 4 lbs at 10 weeks, so it's possible to be all yorkie, just "supersized" fun.
That being said, if you had a female that you knew was in heat and you let her out (even briefly) without supervision, then any male walking by could be daddy. |