What's wrong with this spike?

As you can see, this guy is relatively thin and has wounds under all four legs. Any ideas of what's wrong with him?

Maybe just shedding his summer coat. Doesn't look too unhealthy to me.

You can tell by how he is standing, something is wrong. He is humped up a bit in the flank area and seems to have some hair missing in the same area.

He's been snow-birding my feeder all day and and night.

Probably got his back legs hung in a barbed wire fence and finally got loose

X2

x3, and a because of the injury that's why he's 'snowbirding' your feeder. Coyotes will get him unless you take a kid or novice to hunt him.

Doesn't look like a fence caught deer to me.

He does not have the lower leg scares to show he was hung in a fence. I believe that he could have landed on a fence, but who knows at this point.

Looks like he was hung up right in front of his hips to me.