The front 3 are the oldest. They set the pace. The next 5 are strongest and fittest and protect the pack from Frontal attack. With this system, the wolves in the middle are safe from attack. The 5 behind are also the strongest and fittest assuring security. The one behind is the leader, he is prepared to fill any position needed and support wherever needed.
Leading does not mean being at the forefront. It’s taking care of the whole team