I don't understand.
--You know you got her from a puppymill,
--she has no papers,
--no parental history thus no health history,
--you are not even sure of her breed,
--her appearance doesn't meet either the Yorkie or the Silky standard,
--and she is over 9 years old,
so
why did you breed her?
This just is not making sense. Was it an accident? You have had her for 9 1/2 years unaltered? Has she been bred before? Are you going to spay the old gal now? Have I somehow misunderstood the situation you describe? This is just incomprehensible to me!