Dog treadmill

FIG. 1 is a front, top, and left perspective view of a dog treadmill showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a rear, bottom, and right perspective view thereof.

The broken lines illustrate portions of the dog treadmill that form no part of the claimed design.