Mixer-wagon for animal food products, which comprises: a support frame (2) abutted against the ground by means of one or more pairs (6, 7) of wheels fixed to one or more corresponding axles; a containment tank (10) mounted on the support frame (2), intended to house, at its interior, a food product, and having weighing sensors associated therewith in order to detect the weight of the food product loaded in the containment tank (10) itself; one or more screws (18) provided with cutting blades (19), arranged inside the containment tank (10) and drivable for cutting and mixing the food product; distribution means (22) operatively connected to an outlet opening (20) of the containment tank (10) in order to receive the food product, and provided with one or more dispensing outlets (23) arranged along the corresponding lateral flanks (5) of the mixer-wagon in order to dispense the food product on a ground portion of the manger adjacent to the corresponding lateral flank (5); two brushing elements (25), drivable and movable in an independent manner, each of which frontally arranged along the corresponding lateral flank (5) of the mixer-wagon in front of the corresponding dispensing outlet (23) of the distribution means (22), and drivable to operate on the ground portion arranged adjacent to the corresponding lateral flank (5) in order to push a residual part of an old food product (previously deposited on the ground) in the mangers before the aforesaid distribution means (22) of the same mixer-wagon deposit the fresh food product in the mangers.