Grasses have carbohydrates, proteins, minerals and other nutrients that make them desirable to grazing animals. But it is the proportion of sugars (energy) to protein that affects nutrient uptake the most.
We can smell the grass and describe the smell as sweet, not sweet, sour, putrid or many other descriptions. Cattle choose their grazing based on smell, flavor and how the plant makes them feel afterwards.
When we allow cattle selection in their grazing (growing plants) we know they…