A machine permits the distribution, in rearing buildings, of forage gathered in round bales, in step with the unwinding of the said bales at the heart of the machine. The machine includes a trailer equipped with a chassis 1 fitted with a hitching drawbar 2 articulated at 25 and a set of wheels 3 mounted on side arms 4 oscillating under the effect of a ram 6. On this chassis is mounted a tub 7 equipped with a movable bottom 8 the trajectory of which incorporates a dihedral with a variable angle determined by a concave or convex diversion of the active trajectory of the conveyor belt and at any point of the latter, which conveyor belt discharges into a device for shredding and ejection, whose large-diameter rotor carries shredding teeth 22 at its front and fan blades 24 at its periphery. The dihedral angle can be adjusted by a ram 13; its position in space can be determined by the action of the ram 6 or by inflection of the drawbar around the shaft 25 or by the combination of these different actions.