The ornamental design for a petshoe, as shown and described.
FIG. 1 is a top, front, left perspective view of a pet shoe, showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a right side elevation view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a rear elevation view thereof; and,
FIG. 7 is a bottom plan view thereof.
In FIGS. 2 and 6, broken lines that depict portions of the pet shoe interior form no part of the claimed design. In FIG. 7, broken lines on the shoe sole depict elements that also form no part of the claimed design.