Pet Door

FIG. 1 is a front view of a pet door, showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a front, left and top perspective view thereof;

FIG. 4 is a perspective view in an opening state of FIG. 3 ;

FIG. 5 is a perspective view in an opening state of FIG. 3 ;

FIG. 6 is a left side view;

FIG. 7 is a right side view;

FIG. 8 is a top plan view; and,

FIG. 9 is a bottom plan view.

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