Abstract: In an animal stall, a brisket board extends along the front end portion of the floor, and a keeper board extends along the rear portion of the floor. An animal mattress is disposed on the floor between the brisket board and the keeper board, with the mattress extending over the keeper board. The mattress includes a fabric enclosure having a plurality of separate compartments within the enclosure, and comminuted rubber from used vehicle tires is disposed within each compartment. A top fabric blanket is disposed over the mattress with an end of the blanket attached to the keeper board, and an opposed end of the blanket attached to the brisket board.