Animal processing devices and methods for processing animals with such devices are described. An animal processing device comprises a housing having a power source for driving a bolt for impacting a predetermined portion of the head of an animal, a trigger for activating the bolt, and a nosepiece. The nosepiece comprises a first portion that is non-moveably positioned relative to the housing. The first portion comprises an opening positioned along the driving direction so the end of the holt can move through the opening, and a contacting surface at an end of the first portion. The contacting surface may include a cutout region having a shape related to the shape of the predetermined portion of the head of the animal to be processed and can accommodate the predetermined portion of the head of the animal to be processed.
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