Red fox dens can be quite elaborate, with tunnel systems up to 75-feet long, constructed four feet or more under the surface. The dens often have several entrances - usually one or two main entrances and two or three less conspicuous plunge holes for avoiding potential predators. Both species of fox will often maintain two dens, so if one residence is disturbed, the fox family can quickly relocate. Friday The breeding season for gray foxes can last from mid-January to May, although breeding activity is most likely to take place in early March. Prior to the birth, the male leaves the den while the female provides a soft, grass-lined maternity chamber in the den.
Gray fox vixens usually give birth to three or four pups at a time.
During the first weeks, the vixen cares for the pups alone, feeding them milk three times as rich as cows milk. Then the male returns, and takes responsibility for gathering food, which is first regurgitated for the pups and later simply given to them whole at the densite. By the way, the Montshire has a wide range of mounted animals native to New England, and you can see a well-preserved mount of a gray and a red fox at the Museum.