Ok - I cut the grass last week and decided to make some grass hay to use as a bedding in my chicken coop - I dry the grass under a car port to make sure that it is all nice and dry - so today I put it into 3 large contractor type black plastic bags - wrapped the top of the bag real tight but now I'm wondering if the grass will get moldy over time and if it would be better to let air into the bags by putting holes into the plastic bags - the grass hay makes nice bedding so I would like to save it for future use - any ideas - I see farmers have these large rolls of hay in some kind of white covers laying in the field - I wonder if they are air tight - would appreciate your thoughts - Joe