I switched to pine pellets two days ago, they are mixed with carbon. I got them at TSC, and I gotta say, these are the best things ever. No smell at all (and I mean none). I am gonna work on a custom made scooper to clean poop out, just a tad too big to fit through a litter scoop. Chicks love to scratch them around. Also only a dollar more for a bag and they cover more. Highly recommended.