FIG. 1 is a front, right, top perspective view of a pet barrier, showing my new design;
FIG. 2 is a rear, left, bottom perspective view thereof;
FIG. 3 is a front elevational view of the enlarged scale thereof;
FIG. 4 is a rear elevational view of the enlarged scale thereof;
FIG. 5 is a left side view of the enlarged scale thereof;
FIG. 6 is a right side view of the enlarged scale thereof;
FIG. 7 is a top plan view of the enlarged scale thereof;
FIG. 8 is a bottom plan view of the enlarged scale thereof;
FIG. 9 is an enlarged view of detail 9 in FIG. 1;
FIG. 10 is an enlarged view of detail 10 in FIG. 1;
FIG. 11 is an enlarged view of detail 11 in FIG. 1;
FIG. 12 is an enlarged view of detail 12 in FIG. 1;
FIG. 13 is an enlarged view of detail 13 in FIG. 2;
FIG. 14 is an enlarged view of detail 14 in FIG. 2;
FIG. 15 is an enlarged view of detail 15 in FIG. 2;
FIG. 16 is an enlarged view of detail 16 in FIG. 2;
FIG. 17 is an enlarged view of detail 17 in FIG. 3;
FIG. 18 is an enlarged view of detail 18 in FIG. 3;
FIG. 19 is an enlarged view of detail 19 in FIG. 3;
FIG. 20 is an enlarged view of detail 20 in FIG. 3;
FIG. 21 is an enlarged view of detail 21 in FIG. 4;
FIG. 22 is an enlarged view of detail 22 in FIG. 4;
FIG. 23 is an enlarged view of detail 23 in FIG. 5;
FIG. 24 is an enlarged view of detail 24 in FIG. 5;
FIG. 25 is an enlarged view of detail 25 in FIG. 5;
FIG. 26 is an enlarged view of detail 26 in FIG. 6;
FIG. 27 is an enlarged view of detail 27 in FIG. 6;
FIG. 28 is an enlarged view of detail 28 in FIG. 6;
FIG. 29 is an enlarged view of detail 29 in FIG. 7;
FIG. 30 is an enlarged view of detail 30 in FIG. 8;
FIG. 31 is a front, right, top perspective view of its enlarged scale in an alternate configuration;
FIG. 32 is an enlarged view of detail 32 in FIG. 31;
FIG. 33 is an enlarged view of detail 33 in FIG. 31;
FIG. 34 is an enlarged view of detail 34 in FIG. 31;
FIG. 35 is a front, right, top perspective view of its reduced scale, indicating the usage environment;
FIG. 36 is an enlarged view of detail 36 in FIG. 35; and,
FIG. 37 is a front, right, top perspective view of its reduced scale,indicating another usage environment. The dash-dot-dash broken lines are for notating enlarged views and form no part of the claimed design.