Abstract: A system produces a multi-layer product by forming as many different ingredients as is required for the final product in steps that can be separate from each other and then combining these ingredients in an extrusion die that is formed to flow the separate ingredients in side-by-side flow paths and then combine them where necessary for the final product to be formed. Specifically, two of the flow paths are sandwiched by a third flow path whereby the final product is in the form of a sandwich with two ingredients in layers between two separate layers of a third ingredient. A specific example of the food product is an animal food treat in the form of a cheeseburger.

Abstract: A system produces a multi-layer product by forming as many different ingredients as is required for the final product in steps that can be separate from each other and then combining these ingredients in an extrusion die that is formed to flow the separate ingredients in side-by-side flow paths and then combine them where necessary for the final product to be formed. Specifically, two of the flow paths are sandwiched by a third flow path whereby the final product is in the form of a sandwich with two ingredients in layers between two separate layers of a third ingredient. A specific example of the food product is an animal food treat in the form of a cheeseburger.

Abstract: A system produces a multi-layer product by forming as many different ingredients as is required for the final product in steps that can be separate from each other and then combining these ingredients in an extrusion die that is formed to flow the separate ingredients in side-by-side flow paths and then combine them where necessary for the final product to be formed. Specifically, two of the flow paths are sandwiched by a third flow path whereby the final product is in the form of a sandwich with two ingredients in layers between two separate layers of a third ingredient. A specific example of the food product is an animal food treat in the form of a cheeseburger.

Abstract: A product densification method for producing sinking aquatic feed, densified cattle "range cubes" or the like includes a conventional cooking extruder into which feed ingredients, including cereal grains and additives, are introduced. The feed ingredients are cooked, gelatinized and expanded in the cooking extruder to form an intermediate feed product. The intermediate feed product is then loaded onto a cooling conveyor where it is transported to a product densification unit or PDU. The PDU is a specially designed high speed, low shear extruder which is adapted to densify and shape the intermediate feed product into a final feed product which is dense enough to sink in water and stable enough to stay together for a considerable period of time while submerged or exposed to weather. The density of the sinking feed, and therefore, the sink rate thereof, can be controlled by controlling the shaft speed of the high speed screw in the PDU.