Extruded foodstuffs having maintenance level actives

摘要

Improved extruded human and animal foodstuff products are provided which include nutritional or therapeutically effective amounts of an active such as vitamins, vitamin precursors, and drugs such as tetracycline. The products are produced by extrusion, preferably with initial preconditioning followed by extrusion through an extruder equipped with a die assembly having an elongated, tubular body and an endmost restricted orifice die plate.