yeah, DG would be ideal. i decided against the saw dust for the dogs because i didnt even think about the fact that they'll probably breathe it, and ill bet that would is treated. the think about rock dust (decomposed granite) is that im in a camry, and to fill one spot id probably need a truckload. im looking to fill 3 spots. so in order to get that done, id have to have them deliver it. which ill probably end up doing next spring. in the meantime.... looks like im looking at a muddy winter....lol