Equine Fresh is pine sawdust made into a soup, then extruded into pellets, then super dried. There is no dust, and you should Not follow the directions on the package bc they tell you mist them down before using. This forces you to use them up prematurely and buy more. I have used them for my horses for about 4 years now and the way that they soak up urine twice and keep down the ammonia is amazing. One horse produces a great deal of urine. They break down first and it looks like grape nuts that have gotten wet, but it is still a powder. The 2nd time they soak up urine and stay wet. This is what happens when used in a horse's stall.
For the birds it takes a lot longer than 2 days for them to break down. They keep down the ammonia in the bedding on the bottom of the coop. Last time I cleaned the bottom on my coop I discovered that they were still usable and smelled great. The other bedding was soiled on top of them.
There is nothing that smells as bad as a dirty chicken building, no matter what the size, and the animals housed in it have to breathe that in. Newbies think that you must clean them up all of the time, but that isn't really necessary, as long as they are cleaned up on a regular basis.
This product goes by several names, but they all come in a 40 pound bag and it sells for $5.00-$7.00/package. I use one package for my coop every time I rebed.