I am no breeder, but I will tell you what I have learned from reading other posts here on YT.
1. Becoming a breeder takes years of discipline and research on the breed.
2. You should have a mentor that is well versed on the breed, and they should be available to you should anything seriously go wrong during the whelp or the breeding.
3. Yorkie females under 5 pounds should NEVER be bred at all. This is very dangerous and could ultimately kill the female.
4. There is a list of tests that should be performed on both the male and female prior to breeding to check for STDs, liver shunt, and other problems that may occur.
5. The size of the male does not matter when determining the size of the puppies and whether or not the female will carry them to term and have healthy puppies.
6. A check of both the female's and male's blood lines should be done prior to breeding.
7. Breeding is not just throwing two dogs together.
8. Your male could become injured in the breeding process and cause permanent damage to him especially if the female is inexperienced and there is noone there to offer assistance.
9. Breeding should take place in order to better the breed not for financial gain.
10. If done properly, you will not make money because you will spend a small fortune doing what is best for the breed.
This in no way covers what all should take place prior to breeding. You should know that breeding should not be taken lightly and that there are and will be consequences to going ahead with it. This breeding could ultimately ruin your male for the rest of his life.
If you really want to breed your male, do research on the breed, find a mentor that specializes in the Yorkie breed, research his bloodlines and make sure there are no genetic defaults, and make sure your reasons for breeding are not for profit but to better the breed.
I used to think breeding was no big deal, but thanks to YT I have seen the light.
If you will do a search of the threads posted here, you will find many reasons why breeding should not be taken lightly.
This thread should really be moved to the breeders section as there are many great breeders here who could give you a better insight than I have.
Good luck to you.
YorkieProud