List Of How Often Do Cows Need To Eat References. To be healthy and provide humans with quality meat or milk, cows must eat up to 100 pounds of feed per day, consisting mainly of hay (dried grass or alfalfa), pastures grasses, silage (fermented grasses, alfalfa, or corn), and byproduct feeds (soybean meal, brewers grains, or corn gluten feed). If you were bottle feeding the calf, you wouldn't be doing it every 4 hours.
The resulting number is its adg. This feed is called a total mixed ration (tmr) and. They do not contain anything that is toxic to cattle.