I have a small 2 stall barn I turned into a chicken coop. We also have horses so have access to plenty of straw. We get it fresh each year from our farmer neighbor, so have never had any that is dusty. My chickens have straw in their coop which they keep scratched around enough when they are in there to keep it fluffy and underneath is hard packed dirt (from original horses) so it is easy to scrape out. They are only in at night or when we are going to be away past dark (and we work at home, so that isn't often), so they aren't on it all of the time. Their outside run (when we are away) is fenced pasture, so mixture of grass/rock/old horse poop/and straw that they have dragged out of their house. Otherwise they roam the pastures, yard, and driveway. I have tried sawdust, but can only get it around here from TSC and it is really dusty, so I don't like to use it.