Dog Stair

FIG. 1 is a top perspective view of a dog stair, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevational view thereof, the rear elevational view being a mirror image of FIG. 3 ;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the figures are for the purposes of illustrating portions of the dog stair, which form no part of the claimed design.