Question: how much hay does a cow eat a year?
Answer: For a cow needing 8,190 pounds of hay per year and a bale weight of 960 pounds, divide 8,190 by 960 for a yearly need of about 8.5 bales per cow. Multiply this by the total number of weaned cattle in your herd. For example, 45 cows multiplied by 8.5 bales per cow results in a total need of 383 bales.