The ornamental design for a petnailclipper, as shown and described.
FIG. 1 is a first perspective view of a pet nail clipper showing my new design;
FIG. 2 is a second perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof; and,
FIG. 9 is an exploded perspective view thereof, shown with a portion removed for completeness of illustration.
The broken lines shown in the drawings depict portions of the pet nail clipper in which the design is embodied that form no part of the claimed design.