Since you do not know the size of the father, even a pregnancy could be dangerous from the things I have read about breeding/pregnancy/whelping so the emergency spay is probably the lesser risk. Then even after puppies are born, if she makes it that far, the mother can still die from other post-whelping ailments. My little female was only 3 lbs. when she was spayed and she came through just fine. Just be certain that you have picked a small breed vet who has a long history of spaying small breeds - you can get referrals through local Yorkie reputable breeders. The vet will advise you as to which is the lesser risk of all.
__________________  Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |