This is what I would do if he were my goat. First of all, I would give him a tablet of GasX. You can get it at any grocery or drug store. If it is simple bloat, the GasX will cause him to deflate promptly. The baking soda certainly can't hurt either. If it is entero, without the antitoxin it isn't going to make much difference what else you do. A dose of penicillin might help. Penicillin is effective against clostridium perfingens. Usually, entero kills very quickly, but sometimes you are lucky and the animal will have a slower form and this gives you some time to round up some antitoxin. Just from the picture it is hard to tell for sure if it is entero or not, but from the way he is standing I'm guessing it may not be.