The squirrels had lost their home in an incident involving a chainsaw. Pixie's own pups had just recently been weaned and sold. The timing was just right for the pooch to take in the baby squirrels until they were old enough to be on their own. They have since moved to a nature preserve nearby. According to her person, the generous mama misses them, but "dog biscuits seemed to help Pixie's recovery."
Wags to my buddy Shep for keeping tabs on the squirrel news!