I said exactly the same to my DH and he to me. We loved the look of the Yorkie and the temperment but never would it be treated like anything other than our loved dog.
Well needless to say we were wrong and he has lots of clothes now. (most all still to big) but ready when he grows into them lol. And we to talk baby talk to him. DH who was always a big dog person and at first would say this is the wifes dog now says Hey he's my little buddy.
