Hay and straw are both common types of fodder used to feed animals like cows, horses, and goats. However, there is an important difference between the two. Hay is made from dried grass that has been cut and cured, while straw is a by-product of certain grain crops that have already been harvested. Hay is a more nutrient-rich option for livestock than straw. It contains higher levels of protein, fiber, vitamins, and minerals. In addition, hay is typically easier to digest and provides more energy. Straw, on the other hand, is a less nutritious option that mainly provides bulk and fiber. It is also not as palatable for animals, so they may not eat as much of it.