you can use wood pellets for horse stalls, works very well, I mix with wood chips and/or hay, if you have poop boards under your roosts you can cover them with empty feed bags I cut them open, they clean very easily , helps to keep the floor clean. I haven't called but CN sawdust is a horse supply they also have chicken and dog feed. there is one on the North end of Rockford not sure were you are but there is a farm on Lincoln Lake between Belding and Lowell. they have both straw and hayOk. I need coop bedding ideas. My coops are getting pretty bad and I'd like to get them cleaned out while it's warmish this week. Our tsc has no pine shavings and getting them at meijer will cost a LOT. A quick glance at cl tells me that no one has straw listed within 90min of us. I have a 7x6 coop, an 8x10 coop and a 3x8 coop.