The ornamental design for a pair of pet bowls with adjustable stands, as shown and described.
FIG. 1 is a perspective view of a pair of pet bowls with adjustable stands showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a front elevational view thereof;
FIG. 8 is a rear elevational view thereof; and,
FIG. 9 is a perspective view of the pair of pet bowls with adjustable stands where the pair of pet bowls with adjustable stands is shown in a contracted state and a pair of the adjustable stands is removed.
The broken lines in the drawings depict portions of the pair of pet bowls with adjustable stands that form no part of the claimed design.