How to effectively compost chicken poo and kitchen scrapes? I have an earth machine. Main ingredients are poo, pine shavings, straws, kitchen scraps. I don't turn too often but does water accordingly. Should I get an aerator, or buy a second bin? Right now we use the add on method and it seems rather slow. I do suspect not enough brown, should I be adding more straws? Do pine shavings take a long time? Thanks for any input.