Hi jbarmstrong and welcome to the forum. I'm sorry Ron Burgundy is so sick. :( Let's see if we can encourage him to eat. First, try getting some frozen bloodworms. Frozen, not freeze-dried. Thaw them in a small container and use something to take a few worms out. Soak them in garlic juice. You can use the garlic juice from a jar of minced garlic or you can mince your own garlic, then soak the pieces in some tank water. Once the bloodworms are good and garlicky, try to feed those to your guy.
It sounds like your fellow may have an internal bacterial infection. Has he pooped at all? This could be a cause of his bloating.
For now, I highly recommend you get him into 3 tsps of epsom salt per gallon. Start with 1 tsp, as Callistra suggested, and slowly add 2 more tsps over the course of an hour. Predissolve in a bit of tank water before adding (although if you forget this step, it's okay because epsom salt won't burn the fish the way undissolved aquarium salt would).
You can get epsom salt at any drug store or pharmacy, just make sure it has no added colors or scents.
Also, see if you can get some tannins into his tank. For tannins, you can look in fish stores for Indian Almond Leaf or you can use naturally dried, clean oak leaves. Crumble the leaves into the tank until the water is a dark tea color.
If your guy's tank is not heated, I strongly advise you find him a good adjustable heater that can get his tank up to 80 F.
Meanwhile, just in case, start searching your local fish stores for a product called Seachem Kanaplex (active ingredient kanamycin). Although I hope not, we may need it further down the road and since this product is hard to find, it won't hurt to start the search now just in case.
Keep us updated.