The ornamental design for a pet harness, as shown and described.
FIG. 1 is a top, rear, left perspective view of a pet harness, shown open and flattened in a first configuration;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a rear elevation view thereof;
FIG. 7 is a front elevation view thereof; and,
FIG. 8 is a top, rear, left perspective view of the pet harness of FIG. 1, shown closed with the straps fastened in a second configuration.
In the drawings, the broken lines depicting straps and hardware extending from the chest panel of the pet harness form no part of the claimed design. The broken line showing on the pet harness itself depicts stitching and forms part of the claimed design.