The rule of herd of Wolves walking

The sick and old wolves always be moving at very first, Behind them there are 5 youngest strongest male wolves, for safety and security of the group. Then 11 female wolves following them, and been followed by 5 other strong males, where should be the fighters, to take care of the females. At the very end is the head of the group, which moves with a distance to be able to observe the whole herd and make sure nobody lagging out.