NOVELTY - A composter device for composting whole object, comprises housing having a composting chamber (12) arranged to receive the whole object; grinder (68) with grinding elements supported in composting chamber at the bottom end of composting chamber so as to be arranged for grinding the whole object into a ground material; and mixing member supported in composting chamber above the grinder for rotation about an upright axis relative to the housing so as to be arranged for mixing the ground material above the grinder.    USE - As composter device for composting whole livestock carcass (claimed); for producing compost material, used as fertilizer.    ADVANTAGE - The composter device is fully automated and permits matter to be ground and prepared for decomposition in the same chamber as the decomposition process itself while monitoring such parameters as moisture and heat and mixing time in a single unit.    DETAILED DESCRIPTION - A composter device for composting a whole object comprises housing having composting chamber (12) arranged to receive the whole object; grinder (68) supported in composting chamber at the bottom end of composting chamber so as to be arranged for grinding the whole object into a ground material; and mixing member supported in composting chamber above the grinder for rotation about an upright axis relative to the housing so as to be arranged for mixing the ground material above the grinder; the grinder including a first grinding element and a second grinding element rotatable relative to one another about the upright axis of mixing member; the first grinding element comprising rigid member including a slot formed which extends fully through rigid member from a first side to a second side of the rigid member and defining first edges at a periphery of the slot; the second grinding element comprising a lug defining second edges which closely fits within the slot and which is arranged to pass fully through the slot from the first side to the second side of rigid member as the grinding elements are rotated relative to one another; the first edges of the first grinding element being rotatable in close proximity past the second edge of the second grinding element so as to be arranged to produce a shearing action between first and second edges for grinding the object into the ground material.    DESCRIPTION OF DRAWING(S) - The figure shows a perspective view of composter device.    Composting chamber (12)    Cylindrical side walls (14)    Frame (16)    Fixed portion (28)    Movable portion (30)    Handle (40)    Mixer (66)    Grinder (68)