They dig holes to build underground towns. Some towns have been the size of about five city blocks, with a population of about 6 million prairie dogs. When a coterie gets too crowded, the dominant male and female leave to establish a new coterie. Prairie dogs are active during the day. They kiss, nuzzle, and groom each other, which reinforces social relationships.
Prairie dogs protect each other.
While some eat or take care of young, others stand guard.