Livestock Feeder Device

FIG. 1 is a top, front, right perspective view of a livestock feeder device, showing my new design; FIG. 2 is a top, rear, right perspective view thereof; FIG. 3 is a top, rear, left perspective view thereof; FIG. 4 is a top, front, left perspective view thereof; FIG. 5 is a bottom, front, left perspective view thereof; FIG. 6 is a bottom, rear, right perspective view thereof; FIG. 7 is a front side elevation view thereof; FIG. 8 is a rear side elevation view thereof; FIG. 9 is a left side elevation view thereof; FIG. 10 is a right side elevation view thereof; FIG. 11 is a top plan view thereof; and, FIG. 12 is a bottom plan view thereof. The broken lines depict portions of the livestock feeder device that form no part of the claimed design.