What a game! As a direct result of buying this eleven years ago I ended up adopting a wolf at a wolf centre a couple of hours away. One thing lead to another and I'm now a volunteer there, spending most of my Sundays around wolves.
Anyway, the game itself is remarkably accomplished. The authors must have spent a fair armount of time around real wolves judging by the little things such as the gaits and various subtle things such as the head-bobbing of injured wolves. The sound effects are pretty realistic too, apart from that "woof" you get when you click a button - I've only heard wolves bark twice in three years!
I tracked down an additional copy of Wolf via eBay a couple of years ago and donated it to the wolf centre, as to this day there's been nothing that comes anywhere near it. Okay, it's not terribly up to date (as we now know that it's not just alphas who breed, for example), but overall it's still pretty good.
And last, but not least, something you won't find elsewhere - a couple of MP3s:
Travelling Through Time
The tune that's played when you click on the wolf cubs in the "About wolves" section.
Day Trot
Played during daylight hours of the game, you can also listen to it by clicking the wolf cubs (as above) then selecting the territory / scent marking button.
(PS - the difference between w.exe and wolf.exe is that the former won't pop up an annoying box in Win95 asking you to restart in DOS mode - the files are exactly the same.)