Abstract: An apparatus mounted on a tractor processes caked and compacted poultry litter while still located in the poultry house to initiate a composting process. The apparatus engages the caked poultry litter with a primary beater assembly formed with toothed beater paddles to aggressively disintegrate the poultry litter into small pieces. The primary beater assembly rotates in an undershot manner to convey disintegrated poultry litter upward and rearwardly from behind the primary beater assembly into a processing chamber housing an auger mechanism formed with cutting blades along the periphery of the auger fighting to further disintegrate the litter. The auger mechanism conveys the collected poultry litter laterally for discharge from the apparatus into a windrow where composting activity can initiate. The auger mechanism includes single auger flighting at a remote end of the auger and a double auger fighting at the discharge end of the mechanism.