FIG. 1 is a perspective view of a first embodiment of a pet food supplement embodying a new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left side view thereof and is identical to a right side view thereof;

FIG. 5 is a perspective view of a second embodiment of a pet food supplement embodying a new design;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a left side view thereof and is identical to a right side view thereof.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design.