To answer your question..no, two pure bred yorkshire terriers will not produce a silky terrier. They are 2 different breeds.
Since your girls are not to standard, I suggest you do not breed them. I'm sure they have lovely qualities and are very beautiful. However, to preserve the breed standard, only yorkies that meet the standard & have had the appropriate health tests should be bred.
BTW, welcome to YT!
__________________  Jenn & Lulu |