Quote:
Originally Posted by Notsocrates
1. Cows cannot digest grass (cellulose) because they lack the enzyme, cellulase, needed to metabolize that carbohydrate.
2. They are able to nourish themselves by having gut bacteria who do have cellulase. The end product of this metabolism is called carbon dioxide and is passed via the rectum which is called a fart.
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Have you ever lived on a farm with cattle? I did and I never heard a cow fart.