Near Boulder, Colorado, Greenwood Wildlife Rehabilitation Center houses a squirrel rehab center. National Geographic visited and made the video below, showing us what life is like inside a "squirrel hospital."
The patients are mainly orphaned baby squirrels and injured adults. It's not easy rehabilitating squirrels. They need careful handling as patients, along with a hands-off process to reintroduce them to the wild.
Come for the cute squirrels, stay for the good work.