We Have a Coop inside a penned in area ,, . The Coop is off the ground, The Pen is about 13x13 . The area used to have pea gravel.... on the ground,, We shoveled most of it out , and are debating what to use aside from the pea gravel that is left , and dirt that is under that ,, How much hay do you put down,, ?? and Do you put it down shredded up , or put the whole bail of hay in there and let them have at it ??