Under the Same Moon
A lone wolf is a dangerous wolf, and a wolf in danger. Without anyone to stop them, a berserk werewolf is in danger of being identified and of causing an outbreak, both things that draw unwanted attention to them and to werewolves in general. Though most think them myths, everyone knows the stories, and knows to put a silver bullet in the heart of any wolf that walks like a man.
So to stay hidden and safe, werewolves band together. These packs serve first and foremost to provide people who can control each other when they go berserk, to minimise the damage they do and prevent others from getting infected. Additionally, packs serve as a family for those who’ve lost their human families, and a gang to back them up in fights.
Some packs are always on the move, travelling to avoid anyone getting too close to them. Others travel because they hunt feral wolves, lone weres that leave wakes of destruction that need covering up and new pups that need to be cared for. On the other hand, some stay put, putting down roots in a single community, hiding in plain sight. Packs like this are usually an asset to their villages; roving gangs and feral wolves who threaten the townsfolk usually just disappear in the night.
Wolves are usually immediately mistrustful of wolves from other packs. Bitter rivalries are likely to form between packs, whether over territory and resources or old, personal grudges. Combat between packs is unlikely to result in casualties, though: they fight to submission, not to death, and the winning pack will let the losing one flee.
Packs grow by taking in strays, most often new pups left by a rampaging feral. Occasionally ferals can be rehabilitated by joining a pack, though most often they have to be killed, for safety. Additionally, if a pack is destroyed or disbands, the members will usually seek out other packs to join, even former enemies and rivals. Such packs are likely to accept orphans like this, even if it means swallowing an old grudge.