Anti-methane vaccine could reduce impact of cow burps (13 min ) South said there were no side effects for the cows. "Methane production is purely from an organism that's a scavenger - it picks ...

There are many cows out there like Portia, known as fistulated cows. A fistula, or opening, is cut into the side of a cow during surgery. The operation doesn't hurt and the hole doesn't affect the ...