The ornamental design for a dog chew, as shown and described.
FIG. 1 is a perspective view of a dog chew showing our new design; and,
FIG. 2 is a right side elevational view thereof, the left side elevational view being a mirror image.
The break lines in FIG. 1 are to indicate that the appearance of any portion of the article between the break lines form no part of the claimed design, and the broken lines shown in the drawings are included for the purpose of illustrating portions of the article that form no part of the claimed design as well.
The smaller stippled shading and larger stippled shading shown in FIGS. 1-2 represent a contrasting appearance.