I want to know the vets name that this " first do no harm" and with the size difference in these breeds, that is obviously a serious possiblity. I mentioned it in a phone to my vet over the weekend on another matter, and I got a long pause- and a " I fail to see how this could be considered a action in the future to be of anything but a physical risk to the dogs." ( meaning giving birth etc.) Both of my vets were highly alarmed..
Sometimes with highly valuale show dogs ( meaning to their breed in genetics etc) they will artifically inseminate if the donor has pasted on, but it was stored. ( like they do with cows or stud racing horses). However this is to benefit the breed, like in breed, etc. This other situation borders a frankenstien experiment..