okay, so got to the vet's or local livestock store and get:
Bloat ease.. enoughfor the weight of your animal for two doses. Incase 1 does not work.
Enough rumminex boluses for the weight of the animal and a bolus gun.
In Canada or manitoba, hard to find rumminex at a livestock store. We get it from the vet.
You should have on hand a drench bag. Get the vet to teach you how to use it.
Now i hope you have facilites to restrain an animal like a head gate or squeeze chute.
Get the animal in there, halter the head so you don't get hurt.
the boat ease comes in handy plastic bottles like the old pepsi or bottles or like the beer bottles. With the head haltered,shove the bottle in its mouth, kinda down the side. this will take serveral trys and attempts to get it all in. A word of caution, you will get as much on you as in the cow, maybe a bit more...dress appropriately.
Now the rumminex boluses. These boluses help to get the rummin working again.
If you can't get to the vet,
mix water and baking soda...kinda of like an alka seltzer. And drench. I like the bloat ease because you don't have to worry about getting it in the lungs, or them biting off the drench tube and swallowing it. We have used a pipe along with the drench but that yo should ask your vet about.
the idea is to get the gut working again