The ornamental design for pet steps, as shown and described.
FIG. 1 is a right front perspective view of pet steps showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a left side view, the right side view being a mirror image thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a rear view thereof.
The design of these pet steps is intended to prevent pets from jumping off human furniture which can lead to injury. These steps are designed to easily be integrated into the pet owners exsisting home decor.