Pet Toothbrush

FIG. 1 is a front, right and top perspective view of a pet toothbrush showing my new design;

FIG. 2 is a rear, left and bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is an enlarged detail view of area 9 shown in FIG. 1 ; and,

FIG. 10 is an enlarged detail view of area 10 shown in FIG. 1 .

FIGS. 1 , 9 , and 10 show dash-dot-dash broken lines that represent the boundaries and indicators of the enlarged views that form no part of the claimed design. The evenly broken lines illustrate portions of the article that form no part of the claimed design.