Like the others said, even if you have a perfect male, the pups can have the traits of the mother. A male you use for breeding will mark your house too. Having a litter of puppies is wonderful if all goes well.
If not, it can be a heartbreaking , gut wrenching experience.
Huge vet bills with a emergency c-sec and no sleep for days if the pups don't nurse and you have to feed them. You also will be responsible to find forever great homes for your pups, offer a health guarantee, and be able to answer all the questions your buyer will have. As I write this my friend just called, and her dog is due today and is having a green discharge. 95% of the time that means a pup has detached from the wall of the uterus and should be born within a few minutes. Her dog in NOT in labor at all, and the last time she had a green discharge too, and 1 pup was dead and 1 alive. ( with a C-sec.) She is very upset and is rushing into the vets right now. She just told me NEVER AGAIN, Mia is getting spayed, this is to upsetting. You need to ask yourself, why do I want to have a litter of puppies ? Am I starting out with the best healthy and quality sire and dam? Do I have the time to raise the pups, and the $$ if things go wrong? Do I want to put my female dog at risk? Do I want to deal with people coming to my home to see the pups and am I able to answer all the questions about the health and care of the pups. If a genetic problem occurs in the future on a pup, am I able to refund the people's $$ or replace the puppy. Just a few things to consider....