The farm co-op where I get my feed, has a big hay barn where they store the different types of hay and straw. Often the bales come loose and there is always loose hay lying on the barn floor. The co-op lets folks help themselves to the loose stuff, so whenever I am there to pick up poultry feed I bring a lawn-and-garden bag and fill it with grass hay. My geese and ducks love it and it supplements their poultry pellets. Grass hay is better than timothy because it is softer and has smaller leaves plus often is a mix of grass and clover. It's not as rich as alfalfa so I can let them eat all they want. Only thing is I have to use it quickly so it doesn't have a chance to get moldy. I refill a bag every couple of weeks.