An average Red Fox litter consists of five young. For about three and a half months, an underground den is the center of their universe. While the first month or so is spent inside the burrow, the kits spend much of the next two to three months above ground in the vicinity of the den. At about four weeks of age, the young foxes establish hierarchy, which involves much out-of-sight altercation. By the time they are stepping foot outside their den for the first time and we are setting eyes on them, each kit has its place in the dominance hierarchy and peace has returned to the kingdom. Aggressiveness has turned into the playfulness and comradery we associate with young foxes.