Have you found a mentor? Or are you part of the show world?
I ask for two reasons, one is that way you really do know what a sound dog is in the yorkie breed (you only breed those that are a great representation of the breed) and because I'm sure other breeders have gone through something similar and can give you some good advice.
I only have 1 dog, a male, and he's fixed. Easiest dog to train for a first time dog owner (ever!) and a first time terrier owner.
