A system and method for producing a feed product, and the product, are disclosed. A processor apparatus may comprise a housing and at least two rolls rotatably mounted on the housing, with a gap between the rolls through which the path of the crop materials passes. At least one roll may have alternating longitudinal ridges and grooves forming teeth on the surface of the roll. A rotating assembly may rotate the rolls with respect to the housing, and may rotate the rolls at different rotational speeds. A method may comprise cutting plants growing in a field, chopping the plants of the crop materials in a manner to produce pieces of the plants that have lengths of approximately 1 inch to approximately 2.5 inches long, and processing the plant pieces between the rolls rotating at a speed differential of at least 10 percent.
