Hmmmm, that's strange. Hyenas have immensely powerful jaws and are far larger than deer, and I would imagine it would only take one hyena to kill a deer rather quickly. Well, I guess I need to watch more Animal Channel.
No, It's me! I had Hyenas on the brain from reading your post. I believe it was some sort of pack of dogs or something similar that was downing this deer.
I didn't see the beginning and didn't watch the whole thing either. Too brutal for me!