Livestock pen door

FIG. 1 is a rear perspective view of a livestock pen door showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a rear elevational view thereof.

In the drawings, the broken lines depict environmental subject matter only and form no part of the claimed design.