I claim the ornamental design for an animal scratch toy, as shown and described.
FIG. 1 is an front isometric view of the animal scratch toy.
FIG. 2 is a front elevational view of the animal scratch toy.
FIG. 3 is a rear elevational view of the animal scratch toy.
FIG. 4 is a left elevational view of the animal scratch toy.
FIG. 5 is a right elevational view of the animal scratch toy.
FIG. 6 is a bottom plan view of the animal scratch toy; and,
FIG. 7 is a top plan view of the animal scratch toy.
The broken lines shown in the figures that are immediately adjacent to the shaded areas and define unshaded regions represent the bounds of the claim. All other broken lines, including the features within broken line boundaries and the broken lines illustrative of a rope are directed to environment. The broken lines form no part of the claimed design.