wood chuck?

It's a badger.

Looks just like the pit bull mix that lives next door to me...smooth coat and all makes it look like it isn't a dog in the pic, but that would be my guess. Head farther away in the picture looking off to the right causing you to not be able to get a good look at the head...looks like you can see an ear coming up on the left side of it though.

no doubt, groundhog

Badger for sure, heres the back side of a different breed of badger but its close. There are tons of different badgers. I beleive this one was carrying a dead skunk...

I dont think its a ground hog. Ive seen a couple of them around there and lots elsewhere, and they are mostly brown. i have never seen a gray one.

Tough call, probably a gound hog, although they are usually a touch browner. Maybe you have a rare color-phase whistle pig. Badgers are pretty uncommon around here, but it still could happen. Seen a couple back home (U.P.) in the last couple years, NEVER used to have them around, perhaps they are on the upswing.

I go with Wistle Pig (ground hog)

How about you shoot it so we can find out

I checked on the dnr website and they say badgers are all over the state, mainly in the upper half but still have some down in southern Illinois also.

I'm guessing woodchuck.