The ornamental design for a petstairs and ottoman, as shown and described.
FIG. 1 is a perspective view of a pet stairs and ottoman in accordance with the present invention, shown in a non-extended configuration;
FIG. 2 is a front elevational view of the pet stairs and ottoman;
FIG. 3 is a top plan view of the pet stairs and ottoman;
FIG. 4 is a first side elevational view of the pet stairs and ottoman with a second side elevational view being a mirror image of the first side elevational view;
FIG. 5 is a rear elevational view of the pet stairs and ottoman;
FIG. 6 is a bottom plan view of the pet stairs and ottoman; and,
FIG. 7 is a perspective view of the pet stairs and ottoman, as in FIG. 1, shown in an expanded configuration.