Actually its a practice on many dairy farms to give their cows bicarbonate.
It helps to produce a higher butter fat content which gets a better price for their milk...so....
it must be those evil meat producing cows that fart too much......or....
maybe its just another PETA scare/propaganda......or.....
its another liberal vegetarian nutjob attack.
Its hard to keep track of the liberal wackos.....just too many of them