I have often thought Jackson is a Silky but am still not sure... I did not get him from a good breeder. I've heard of lots of bad breeders using Silky mothers with little Yorkie fathers. The two breeds are genetically about the same though, very closely related, as is the Australian Terrier. Jackson is about 16lbs and muscular and longer than tall. He fits the Silky personality to a tee from everything I've read.
Here's a few good Silky websites-
Silkys in Performance Blackrange Championship Silky Terriers Home - Tawny Mist Silky Terriers
Zorro is very handsome! Welcome to YT!!!