In the meantime... I tried my best to get pics of the x-rays for everyone. Unfortunately the didn't work out so well, but if you really look you can see one baby's spine quite visible along the lower part of her tummy line... the other puppy is in the exact same position right above the lower one. They look nearly identicle in position & size.
Sorry about the glare on them... the vet was even holding the envelope for me to try and prevent that