Pet Door

FIG. 1 is a rear, top perspective view of a pet door, showing my new design;

FIG. 2 is a front, bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof;

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

FIG. 9 is an exploded view of the pet door.

The broken lines in the figures illustrate portions of the pet door that form no part of the claimed design.