Most people think that cows only eat grass, but this is actually not the case. Cows are actually herbivores, which means that they are able to digest a variety of different plant materials.
In addition to grass, cows can also eat hay, corn, and oats. In fact, cows have four stomachs that are specifically designed to break down these kinds of materials.
However, this does not mean that cows do not need other nutrients. In addition to their diet of plants, cows also need to consume water and minerals. This helps to keep them healthy and provides them with the energy they need to produce milk and meat.