Pet door

FIG. 1 is a front, right and top perspective view of a pet door, showing my design.

FIG. 2 is a rear, left and 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.

FIG. 9 is rear, left and top perspective view thereof in a usable state.

FIG. 10 is a partial enlarged view of an area labeled 10 in FIG. 1 ; and,

FIG. 11 is a partial enlarged view of an area labeled 11 in FIG. 2 .

The broken lines shown in the drawings are included for the purpose of illustrating portions of the pet door that form no part of the claimed design. In addition, the dot-dash broken lines in FIGS. 1 , 2 and 10 - 11 depict the boundaries of the enlargements that form no part of the claimed design.