She wasn't missing her old family. It was her new family. Her real family.
The owner had apparently decided to surrender only the mother.
"We got back in touch with the people and convinced them," Bloch says. "It did take some convincing, which is unfortunate. But we were able to convince them to surrender the rest of the puppies."
When they returned to the shelter, the puppies were taken straight to the mother's kennel.
She's seen in a video posted to the group's Facebook page, moping behind a box.
When the puppies arrive, she lifts her head. Then she steps forward.