A process for manufacturing a multi-layer pet treat or animal chew comprising the indexing of a moveable mold portion into alignment with the first of a plurality of stationary mold portions fed a first composition by a first injection molding unit to form a first layer in a cavity space formed by the aligned mold portions. The moveable mold portion and the first layer may be indexed to align with a second of a plurality of stationary mold portions fed a second composition by a second injection molding unit to form a second layer over said first in the cavity space formed by the aligned mold portion. The compositions fed by the first and second injection molding units may both be edible. In a further aspect, multi-component pet treats may be provided formed from two materials which may be different in physical, optical, sensual, nutritional or compositional properties. One of the materials may specifically include textured vegetable protein.