Pack (canine)
Animals which typically predominate over others are associated with the term "alpha". Among pack-living wolves, alpha wolves are the genetic parents of most cubs in the pack. Such access to mating females creates strong selective pressure for intra-sex competition.
Runt (novel)
One spring day in the forests of Minnesota, a litter of 4 is born into a wolf pack led by King and his mate Silver. The pups are Leader, Sniffer, Runner, Thinker and Helper.