I'm very new to Diablo III, I've just played for around 2 weeks.
Today I had a Demon Hunter in Torment VI (with max bonus/sub dificulty) with 4 wolves join our group, so I've investigated in Google and I've found the Cloak of the Garwulf gear that gives you 2 more wolves (so a total of 3), but the gear is for level 50 and the bonus does not give you the other wolf so I suppose that exists a very rare Gear for level 70 that gives you 1 more wolf because I don't think that the guy that I've seen playing Torment VI has a 50 level gear set... really not, he got 4 wolves in total, and has 450 paragon levels (I mean legendary level) so it's really an expert.
Then what gear or which other way can give 4 wolves in total to a Demon Hunter?