With larger puppies they can sometimes hide a smaller one. With that being said side x-rays are most of the time useless you easily miss puppies because the uterus is over lapping causing puppies to be on top of one another. If it really is a singleton the movement you feel on both sides can easily be the same puppies I have a couple litters where on x-ray you can see the puppy moving to other side with the other puppies. I'll include a picture you can see it was a litter of 3 puppies but the larger puppy that was by himself started to shift over to the other side with his sisters. |