The ornamental design for a petcarrier, as shown and described.
FIG. 1 is a perspective view of a first configuration of a pet carrier showing my new design;
FIG. 2 is another perspective view of my new design as configured in FIG. 1;
FIG. 3 is a front view of my new design as configured in FIG. 1;
FIG. 4 is a back view of my new design as configured in FIG. 1;
FIG. 5 is a left side view of my new design as configured in FIG. 1;
FIG. 6 is a right side view of my new design as configured in FIG. 1;
FIG. 7 is a top view thereof of my new design as configured in FIG. 1;
FIG. 8 is a bottom view of my new design as configured in FIG. 1;
FIG. 9 is another perspective view of my new design shown in use configuration; and,
FIG. 10 is an exploded view of my new design as configured in FIG. 1.
The broken lines in the drawings illustrate portions of the pet carrier that form no part of the claimed design. All other broken lines are illustrative of environmental structure and form no part of the claimed design.