I don't think mother's generally determine the size of the pup. Has she been xrayed to see the size of the pups and how many there are in there. Personally with yorkies and other toy dogs I would never breed with a larger male. I hope everything works out with her delivery.
Go to the breeder section here and read up...lots of good breeders and they will be able to help you out more.
Hoping your girl delivers safely. If you never bred before I suggest you bone up on what to expect, what to have and what signs of distress to look for. I hope your girl doesn't need a c-section. I have not seen any of the long time breeders on here use a larger stud than the female.
Do you know about both of their lines to give you and idea of what size pups they throw? Have you done any genetic testing on your two to be sure that they are of sound breeding stock?
__________________  Lulu will always be in my heart  |