He is fed in a different section of the barn than anyone else, but the others do come steal his canned after they finish their raw food. I know he can and will eat raw - he has gone to catch mice on occasion when I feed him canned he does not like, brings them back to the barn, and eats them in front of everyone.
He will not eat mice unless he is the one that catches it. They frozen mice from pet stores are no good according to him.
He would not eat the salmon (it was 1/4 the size of a dime, and as thin as a dime). I put that tiny piece of salmon on the plate with his canned food. He would not eat the canned food until I put it moved it to a different plate as it was apparently fraternizing with the enemy. Storm ate the salmon after Nightmare had finished his canned so at least he was happy.
I'm considering putting Nightmare in the large dog crate for a while, to try switch him to raw. That way, no one else could steal his food, and he would have it available to him until he ate it. How I would get him into that cage, though, I have no idea. The cage is huge, probably 4.5 feet high, 4 feet width, and 5.5 feet length. So it isn't like he would be stuck in a tiny cage, he would have some room. I do think it would be much easier to try switch him to raw if he was in there - if he could cope with being locked up as he is used to roaming where ever he wants.