What About Grass-fed Beef?
This article is available here at the Food Revolution site.
Cows, sheep, and other grazing animals are endowed with the ability to convert grasses, which those of us who possess only one stomach cannot digest, into food that we can digest. They can do this because they are ruminants, which is to say that they possess a rumen, a 45 or so gallon (in the case of cows) fermentation tank in which resident bacteria convert cellulose into protein and fats.
Traditionally, all beef was grass-fed beef, but in the United States today what is commercially available is almost all feedlot beef. The reason? It’s faster, and so more profitable. Seventy-five years ago, steers were 4 or 5 years old at slaughter. Today, they are 14 or 16 months. You can’t take a beef calf from a birth weight of 80 pounds to 1,200 pounds in a little more than a year on grass. It takes enormous quantities of corn, protein supplements, antibiotics and other drugs, including growth hormones.
Switching a cow from grass to grain is so disturbing to the animal’s digestive system that it can kill the animal if not done gradually and if the animal is not continually fed antibiotics. These animals are designed to forage, but we make them eat grain, primarily corn, in order to make them as fat as possible as fast as possible.
Author and small-scale cattleman Michael Pollan wrote recently in the New York Times about what happens to cows when they are taken off of pastures and put into feedlots and fed grain:
“Perhaps the most serious thing that can go wrong with a ruminant on corn is feedlot bloat. The rumen is always producing copious amounts of gas, which is normally expelled by belching during rumination. But when the diet contains too much starch and too little roughage, rumination all but stops, and a layer of foamy slime that can trap gas forms in the rumen. The rumen inflates like a balloon, pressing against the animal’s lungs. Unless action is promptly taken to relieve the pressure (usually by forcing a hose down the animal’s esophagus), the cow suffocates.
A corn diet can also give a cow acidosis. Unlike that in our own highly acidic stomachs, the normal pH of a rumen is neutral. Corn makes it unnaturally acidic, however, causing a kind of bovine heartburn, which in some cases can kill the animal but usually just makes it sick. Acidotic animals go off their feed, pant and salivate excessively, paw at their bellies and eat dirt. The condition can lead to diarrhea, ulcers, bloat, liver disease and a general weakening of the immune system that leaves the animal vulnerable to everything from pneumonia to feedlot polio.”
