FIG. 1 is a perspective view of a cow bank showing my new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a top plan thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a rear elevational view thereof; and,
FIG. 7 is a right side elevational view thereof.
The ornamental design for a cow bank, as shown and described.