I have a YorkiePoo and love him to the nth degree but I don't agree with breeding mixes "just because" or "for spits and giggles". My little one was born missing the toes on one of his back feet. I doubt that is going to stop the breeder where he was born from breeding either or both of his parents.
No matter how any of us feels, the OP is going to do what she wants to. That is her perogative and we may never find out what happens. I just hope that her furbabies do not get hurt in the process or worse, Just my opinion though.
__________________ Jenny , Teddy the YorkiePoo, Peanut the Dacshsie & Clara Belle the Yorkie (our newest family member)  RIP Sweet Casey |