The time to prepare for this is now - before you bring puppies into the world, not after. If you're offering your dog for stud service, you have as much responsibility for the welfare of his puppies as do the owners of the bitches bred to him. As a breeder, you have the responsibility of controlling the reproductive future of the puppies you sell. You'll need to learn how to write and enforce a contract requiring the new owners to spay or neuter their puppies. You have a responsibility to your puppies and their buyers to produce the healthiest and most mentally sound dogs possible.
All breeds have genetic health and temperament problems that can be passed on to their puppies.
It takes experience and knowledge to learn how to recognize these problems. Without expensive medical testing and a thorough understanding of genetics and pedigrees, you could easily produce puppies that will be a heartache to their owners and a financial burden to you. Reputable breeders check their adult stock for evidence of hip and elbow dysplasia, eye diseases, thyroid and hormone trouble, skin problems and allergies, bleeding disorders and other problems before even thinking of breeding. As a breeder, you must be prepared to guarantee your puppies against inherited health problems that may not appear until adulthood. This can mean refunding money or replacing a dog years later.