The invention provides a mixer feeder (1) comprising a mobile chassis (3), a tub (4) provided on the chassis (3) and at least one auger provided for rotation about a respective vertical axis of rotation. in the tub (4). Seen in vertical cross-section, the wall (12) of the tub (4) extends at least substantially upright from the bottom (6) of the tub (4). The wall (12) of the tub (4) curves inward at the upper side of the tub (4), sloping up and then extending downward.
