Please read this
http://www.yorkietalk.com/forums/yor...-answered.html
There is so much that goes into breeding and the above link only touches the surface.
Other things that you might think of that goe into being a reputable breeder.
1. Do you know how to whelp a litter? The owner of the bitch may not know how and it'll be your responsibility to assist.
2. Once your boy is used as a stud, he will begin marking everywhere.
3. If the owner of the pup is unable to place all the pups are you willing to take the pups?
4. Should the family of one of the pups be unable to keep the pup are you willing to take the pup should the owner of the bitch be unable to?
5. Your dog should have all required testing performed on your dog, CERF/OFA, Bile Acids. The female should have the same tests performed. Tests are not valid prior to the age of 2. All tests costs upward of $500.00.
6. Should the pups have any genetic defects, be prepared for your boy to be blamed. It's a fact of life the male always gets the blame.
7. Do you and the bitch owner know the pedigree of your dogs inside and out? Parents, grandparents and great greatparents is very important. Also, litter mates, previous litters and any off-spring those dogs may have produced.
I understand that you will make the final decision, but think long and hard. Breeding is not for everyone, and one should not attempt it until knowledge and education on the process is obtained. The life of these little creatures are in your hands.
This little girl is way to small to breed are you willing to take the responsibility of her life? Because you will be indirectly responsible by allowing your boy to stud this girl.