Hay is the general name for grass that has been cut and dried. It can then be stored in piles (called hay stacks), or squashed into rectangle-shaped blocks called bales. Farmers are now rolling the hay into large round bales. Hay is mostly used to feed animals. The animals that eat hay are horses, cattle, goats, donkeys, and rabbits. Hay is fed when there is not enough pasture or rangeland on which an animal can graze. Farmers and ranchers often need to use hay in the winter time when grass is not available.