I am a breeder, and i hope i do not over step my bounds here.
Why is it you are so wanting to breed this dog? Breeding is hard lot of money ,and many vet visits. and when i say do not breed one of my babys
this is what i mean, because of the consorn for their safty, our baby's could end up in puppie mills, and yes even the boys so i would reconsider about breeding him. Just enjoy him as a loving pet. If you so desire to become a breeder gather all the information you can. Then go from there
Buy you 2 yorkies you know would be safe to breed.
