Question: how many pounds of hay does a cow eat in the winter?
Answer: Cows will voluntarily consume 2.0% of body weight or 24 lbs/day. The 24 lbs. is based on 100% dry matter. Grass hays will often be 7-10% moisture. If we assume that the hay is 92% dry matter or 8% moisture, then the cows will consume about 26 lbs./day on an 'as-fed basis.