When I did the quest, I threw the bread at the wolf and I got the confusion message like when you're feeding a dog, and I also left some on the gruond. I thought the wolf didn't eat it but later when i picked them up and counted them in my inventory, i realised i was missing a piece of bread, and so i tried going back to the village and I got the end of the quest.
masataka90, i found the wolf by wandering around in the zoomed in map. when i was close, i heard howling. i had a reindeer with me, which probably helped attract it, though it wasn't that worth it: my reindeer did not survive. next time i will leave my reindeer at home!