How much hay will one cow eat in one month?

On average, a cow will consume about 2-3% of its body weight in dry matter each day. For a typical adult cow weighing around 1,400 pounds, this equates to approximately 28-42 pounds of dry hay daily. Over the course of a month, one cow will eat roughly 840-1,260 pounds of hay, depending on its size, dietary needs, and activity level.