PDA is a problem in this breed, I do hope nobody jumps to conclusions about the breeder before knowing all the facts. It can crop up in the very best of lines too, just like liver shunt and the numerous other problems.
Until the breeder has been made aware of the problem she might not have known it even existed.
Good luck with her surgery, I hope it all works out wonderful.
http://members.aol.com/CYorkie/PDA.html