Their digestive systems are built to handle forages and roughage and use them adequately for their bodily functions. Certain microbes in the digestive system help break down the fibrous material, and the four different chambers in the stomach help with processing the forages in four different stages within that stomach. Cows don't get sick eating grass, they never have and never will.
Antiquality factors such as bloat, fescue toxicity, grass tetany and nitrate toxicity come up but that's mostly associated with the quality or lack there of in the grasses that make them sick. Bloat is caused by high levels of protein in the young grasses or in legumes, and mostly caused by turning animals out on a fresh pasture when they are hungry. Fescue toxicity is caused by a fungus (ergot) that is commonly grown in Tall Fescue, and makes for foot, ear, and tail gangrene in cattle if eaten in excess. Grass tetany is a lack of magnesium in the grass, which, in the cow, leads to symptoms of magnesium deficiency which kills quickly if not treated quickly. Nitrate toxicity occurs after a bad case of frost or drought and nitrates build up in the grasses. Too much nitrate in the cow causes illness which also needs to be treated immediately.
But as for grass being just grass without the antiquality factors I mentioned, ruminants were always designed to eat grass. It's just the way they've evolved over thousands and thousands of years.
cows eat grass
Cows
No. Cows EAT grass. They do not "have" grass.
Cows have a specialized digestive system that allows them to efficiently process grass. They are ruminants, meaning they have a four-chambered stomach that ferments the grass before digestion. The first chamber, the rumen, contains bacteria and enzymes that break down tough plant fibers, allowing cows to extract nutrients. This adaptation helps them digest grass without getting sick, as the fermentation process also neutralizes potentially harmful substances.
French cows eat grass.
Cows
Cows will eat long grass. Haven't you ever heard, "The cow's in the corn?" Corn is a tall grass.
Cows don't eat animals, they eat grass they are herbivores.
humans....we eat cows and cows eat grass...
The energy conversion starts with sunlight being converted to chemical energy through photosynthesis in the grass. Then, when the cows eat the grass, the chemical energy in the grass is converted to mechanical energy for the cows to move and metabolic energy to sustain bodily functions.
Yes, cows eat grass and leaves; but do not eat meat and fish.
Grass