I've been mixing in a lot of the wet/expanding/exploded pellets I have from the wet pallet of O'kies I got back in spring with the good bags, and so far no problems I bought a large litterbox scoop and just filter the pellets that hold together from the sawdust, use it to fill my Aluminum scoop and then pour them into the hopper. This process is working and better than throwing them all out, its the penny pincher in me, I just couldn't do it....LOL