The ornamental design for a protectivecollar for pet, as shown and described.
FIG. 1 is a front perspective view a protective collar for pet, showing our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a front perspective view, shown in a collapsed configuration;
FIG. 8 is a rear perspective view thereof;
FIG. 9 is a front perspective view, shown within an environment of use; and,
FIG. 10 is a rear perspective view thereof.
The broken lines shown on the article depict portions of the article that form no part of the claimed design. In FIGS. 9 and 10, the broken lines depicting a pet represent environmental subject matter that forms no part of the claimed design.