Bestiary unlock for Wolf
Kill 60 Winter Wolves and/or Winter Howlers around 18k, 4k Praag. Then go to the kill collector Constable Luidheim at Kaltenbach Expedition (Empire ch. 20 town) in the Chaos Wastes to complete the Kill Quest: Howler Hunter.
"Can find a few around Kournos' however the best amount will be in Troll Country in the swampy region with the trolls".