Yay! I've had my first encounter with wolves yesterday. I was at Pavlovo military base when I saw them in the distance. Tried to carefully make my way around since they were busy eating an infected. But eventually they caught my smell and came for me. I hid in a barracks, watching them attack the surrounding infected. Really liking the interactions between predators and infected.

They do a lot of damage, and seem to aim for the throat/head area. Since I had a motorcycle helmet, I was saved. (Never usually wear any, but experimental is roaming with players trying to punch you for quick loot...) Some screenshots of the encounter.