Why do cows grow so big eating only grass?

Cattle don't eat only grass, they also eat other plants that are not grasses like alfalfa, cicer milkvetch, and other forbs. They'll even eat leaves from trees and shrubs if they're palatable and within reach. read more

Cattle don't eat only grass, they also eat other plants that are not grasses like alfalfa, cicer milkvetch, and other forbs. They'll even eat leaves from trees and shrubs if they're palatable and within reach. read more

There are many animal species which eat only grass, grains and vegetable matter yet gain body fat. The reasons are that the animals have the ability to digest grasses and convert to energy, protein, bone and fat. read more

Grass is not only difficult to digest, but time-consuming to eat. Many herbivores depend on grass for a majority of their diet, but grass doesn’t contain as much protein as meat does. A predator can get enough protein by eating perhaps only a handful of meaty meals a day. read more