Do you want to get into breeding? Or do you just want to breed her one time? If you don't want to really get into breeding, I would suggest spaying her and not breeding her at all, there are sooo many risks involved (just do a search on here), and if she's just a pet it wouldn't be fair for her or you to breed her. I am a pet owner, and I wouldn't want to breed my babies because they are my pets, and I wouldn't want to put them through any risks, or be stuck raising puppies that I don't know how to raise. Whatever your decision is though, just make sure you do a lot of research, there's so much more to breeding then the obvious. Good luck in your decision!
One more thing, with your pet overpopulation question, I think the breeders say that to mainly a lot of people who just want puppies, or their friends want a dog like theirs, etc. I don't think they ever meant that their puppies are more desirable then anothers. This is just my guess though, like I said I'm not a breeder, so maybe a breeder can correct me if I'm wrong.
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