They keep the grass down without the farmer having to turn on a tractor and hook up a mower to mow the grass him or herself. While he or she's got cows eating the grass, the farmer can be free to do other things that need to be done. Plus the grass benefits from the grazing cows, enabling the grass to grow more healthier when it is being grazed; the feces and urine from the cows also aid in grass growth. The deposition of manure leaves the farmer one less job to do as well; he/she doesn't need to spread manure that would've otherwise accumulated in the drylot if he/she had to feed the cows in a drylot instead of having them get their on food out on the pasture.
No, cows are herbivores, they rely on plants for nutrition.
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plants that do not taste good
Cows eat plants only and not meat or bugs, but they aren't the only ones who eat plants. All the herbivores and omnivores eat plants.
Consumers that only eat plants are called herbivores. Herbivores typically rely on plant material such as leaves, fruits, seeds, and stems as their primary source of nutrition. Examples of herbivores include rabbits, deer, and cows.
They are called herbivores.
you really on plants by giving them carbon doxiode
Same thing as other cows do. See related question below for more.
Cows are not plants, they are animals, which are capable of growing in any and all seasons.
Tecnically, the Sun, because the Sun transfers it's energy to plants through sunlight and plants transfer energy to cows through digestion.
Thorn bushes
Nobody. Cows don't eat donkeys. Cows are herbivores, meaning they only eat plants, not other animals.