Things You Find in the Field: Skull and Bones

MOH and I found these scattered bones on the flood plain of Slough Creek near Highway 50 at Devils Gate when coming back from our breccia hike. We thought it might be a sheep (or more than one sheep) because of the bits of wool (or light colored fur?) that were scattered all around.

I'm not terribly good at identifying bones, but found these comparison skulls: cow, sheep, mule deer, and another mule deer, enlarged from this page. Still can't tell! Any ideas?

Dem Bones

I found a skeleton out in the field the other day. In fact, here and there I've seen a lot of animal bones - in one location the bones were scattered over an area about 50 feet in diameter, one rib here, another one there, as though a coyote pack had torn everything asunder. That one looked like a cow to me; this one is smaller, possibly a deer?
Here's a detail of what is left of the pelvic area.
Here's a detail of the skull, with large teeth and a pointy nose. Any bone people know what it is?