It's cool, isn't it? Like the litter just eats the poop and the soil turns rich in the process...love that concept of the poop being digested into something better and that smells healthy. I've noticed, too, that the poop is more easily digested now that I'm using the FF, than it was before with regular feeds. I think it has less far to go to composting when the grains are transformed in that way and are not coming out in the feces undigested.