Yorkie breeding, done properly and ethically will involve a lot of elements that come into play...and come together, during the process and your program. One must consider if you will be breeding your Yorkie 1 time or if you actually wish to enter this world and learn how to breed Yorkie puppies and create a program that you will run from your home.
Those who believe that breeding will be a great method of gaining a 2nd income should be aware that most ethical, caring breeders put quite a bit of the money back into the dogs. Do note that we say quite a bit, not all...There is some profit to be made, however it will only work well if your main goal is the joy of doing this and not monetary gain.
It is an ongoing cycle of working hard to improve the bloodlines, create dogs who meet the AKC standard in regards to conformation and produce healthy pups who are well socialized and happy....all while maintaining the integrity and health
of both dam and sire.
Breeding will not make you rich. Breeding a Yorkie, in the ethical way, is done to create happy, healthy puppies
...and the love of the dog comes first and the money comes secondary. Only with this mindset will you have the proper goals, goals that will produce an end result of expectational litters with puppies who are sought after.
It is recommended that a female is bred after her 2nd heat and before she is 5 years old. Now, a female can enter heat as young as 4 months old, this is much too young to become pregnant. It would put too much stress on the body and it is unethical and unhealthy for a growing puppy to have the additional task of the rapid growth of pregnancy.