Usually wolf pack consists of the parents and puppies. Sometimes in the flock lives and several adult animals not involved in reproduction. The existence of the pack is based on strict discipline, in which all members of the community unconditionally submit to the leader of the pack - the mothers wolf.
In late spring the flock breaks up. While the adult male and female are separated from it, to bring and raise puppies.
Den, in which wolves raise their puppies are hidden, well protected places. This is usually burrow under covers in the rocks, deep cracks, gullies, ravines. To the lair of the wolf is almost impossible to go unnoticed. Most importantly, what guided the wolves when choosing a lair, the reliability of the shelter and overview of the terrain, which allows to detect approaching danger.