A cubicle (10) for an animal, a system for an arrangement within the cubicle and a method for mounting said arrangement. The cubicle (10) has an open side (12) though which the animal enters the cubicle (10) and an opposite end for the animal's head. The cubicle (10) includes a brisket board (13) for positioning the animal in the right position within the cubicle (10) and a mattress (16) placed on a cubicle floor (14) for the animal to rest on. One side of the mattress (16), and one side of the brisket board (13) are secured to the cubical floor (14) by an elongated profile (25) securing both the mattress (16) and the brisket board (13) to the floor (14).