Esther IS pregnant. The BAD news is....it looks like only one or two puppies are in there!! Ultrasounds are not a tool used for "counting" pups ( Xrays are), they are used for simply confirming pregnancy. Xrays cannot be used to actually count puppies until day 51-53 (vets will vary), because the babies' bones do not calcify until that stage of gestation. There may be a pup hiding in the rib cage, but since this one visible pup is so huge, it's possible that this is the only one!