So I have mentioned the Exchange in my wolves Bios. I felt that I needed to explain.
The Exchange
Every year on the anniversary of wolves coming to this planet all of the Packs get together to 'exchange' young wolves that have different elements that are born into the other Packs. This was a tradition set up by the first Packs. They had come from a dying world and felt their children's best shot at survival was to exchange them and make each Pack stronger. This also limited the inbreeding and medical conditions that could come of it. To this day the Packs still practice this tradition. One Pack each year is chosen to host the Exchange on their territory.