The device for partitioning (1) for animals, according to the invention, comprises a front side (2), a rear side (3), two lateral sides (4) and a bottom (5). - the front side (2) comprises at least two posts (6) each comprising, on two opposite sides of the means (7) adapted to the fixing of a lateral edge of a front wall (8), - the rear side (3) comprises at least two posts (6) each comprising, on two opposite sides of the means (7) adapted to the fixing of a lateral edge of a rear wall (9), - the posts (6) of the front sides (8) and rear (9) comprise means (10) for the removable fixing of a lateral wall (11), in order to constitute the lateral sides (4), which means consist in a groove of the housing (10) provided on the whole or practically their entire height, adapted for mounting and the resistance of said lateral walls (11) by simple sliding, on at least two levels in height indexing.
