Lol, the bigger the better.
13lbs is still a small dog. Jackson is my big boy, he's 19lbs or so. The big lug. I do question if he's a Silky as well sometimes - not so much because of size... purebred Silky's can be small and pruebred yorkies can be larger etc but just personality, other features, etc. I did not get him from what you may call a good breeder so no papers etc.