For me, that was the coolest thing about the pregnancy, getting to see the puppies move in Rose's belly. Look behind the ribs when she is laying down.
That is actually how I was able to tell how many puppies were left during the welping. I would gently touch in this area to see if there was any more movement. 1st puppy came out at about 4 am and the last one was born at 10:30 pm. Long day.
At this stage an xray will show if she is pg and you can get a decent idea of the number of puppies present. An ultrasound will show that too, but the vet I use charges a lot more for one than she does an xray.
My concern with this dog is that if she's not pg and not eating she may have pyo, so I would have her examined by a vet ASAP.