How a wolf pack moves

A wolf pack: the first 3 are the old or sick, they give
the pace to the entire pack. If it was the other way
round, they would be left behind, losing contact with
the pack. In case of an ambush they would be
sacrificed. Then come 5 strong ones, the front line. In
the center are the rest of the pack members, then the
5 strongest following. Last is alone, the alpha. He
controls everything from the rear. In that position he
can see everything, decide the direction. He sees all of
the pack. The pack moves according to the elders
pace and help each other, watch each other."
Cesare Brats photo.
gs = l