Question: how many round bales of hay does a horse eat per month?
Answer: If you are feeding only hay, then an average-sized horse on a moderate workload will need to eat at least 25 pounds of hay a day. For a four-month winter, then, you will need about 6,000 pounds of hay. Assuming that you're getting round bales that are around 750 pounds, that means you need 8 for the winter.