"Wolves live and hunt in packs, which, contrary to popular belief, are not led by the strongest in the group, but typically consist of a mated pair, their pups, and juvenile offspring from previous mating seasons. Offspring generally leave their parents’ pack upon reaching maturity, at which point they seek out mates of their own to go form their own packs elsewhere."
Wolves are excellent animal companions, specially for their ability to knockdown enemies and make them prone (-2 to AC and -2 penalty to attack rolls) plus they can Aid their masters' attack (+1-4 to the first attack roll). They will give their masters a maximum of +6 bonus to attack rolls!!