Rather than have vicious battles on a daily basis, these positions are maintained through behavioral interactions. Dogs soon learn what submissive and dominant actions are and how to play the game. Specific postures and facial expressions are used as signals to maintain this order. Still, because of their instinctive will to survive and do what is best for themselves as an individual, most animals constantly try to improve their rank in the pack and this can lead to brief skirmishes. This is their way of life, the best way for their species to survive.
Dogs naturally dig holes for protection.
This may be to cool their bodies on hot days or make dens in which to whelp and raise their litters. They bark at intruders to warn other pack members of a potential danger or, at other times, to signal their own location. They use their stool and urine as territorial-marking devices to show that the space contained within these boundaries is an area they possess. The things we've described here are those that make a wild dog an effective being. These behaviors come quite naturally for the animal.