Yes, hay cover can significantly reduce spoilage by protecting hay from exposure to moisture, sunlight, and other environmental factors. When hay is left uncovered, it is vulnerable to rain and snow, which can cause it to become wet and promote the growth of mold and bacteria.
Hay spoiled by mod and bacteria has lower nutritional value and can be unsafe for livestock. A hay cover acts as a barrier, keeping moisture out and allowing the hay to stay dry and well-preserved. By shielding the hay from direct sunlight, the cover prevents nutrient degradation and color fading.