Just to add to what Batmom said: a neighbour had a Chow that survived bloat and torsion. During the surgery, the dog's stomach was tacked so that torsion could not recur. Bloat could. And did. Repeatedly. After one occurrence, my vet said that bloat could be just as bad as torsion, maybe worse. Eventually, he bloated twice in one day, and did not survive the second time.
I hope Spencer is not bloating, and that you can find a solution to the gas.