We claim the ornamental design for an animal feeder, substantially as shown and described.
FIG. 1 is a side view of the animal feeder. This drawing shows the movable sleeves which can be manipulated by animals to reveal holes which can contain food.
FIG. 2 is a side view, slightly rotated, of the animal feeder of FIG. 1.
FIG. 3 is another side view, slightly rotated, of the animal feeder of FIG. 1.
FIG. 4 is yet another side view, slightly rotated, of the animal feeder of FIG. 1.
FIG. 5 is an end view of the animal feeder of FIG. 1; and,
FIG. 6 is an opposite end view of the animal feeder of FIG. 1.