I'd get a vet out there if you want to save the cow.
The stomach's probably been the problem all along.
Better to have the vet come to you - that cow's probably in a lot of pain with its stomach stretching out like that. Could be twisted, could be blocked. Do him the favor of not handling him too much.
If you want to push the issue, the vet might give you a break on price if they misdiagnosed it the first time.