The ornamental design for a dogboneblister of a blister pack, as shown and described.
FIG. 1 is a top perspective view of a dog bone blister of a blister pack;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a right side elevational view thereof.
A rear elevational view is not shown because it is identical to the front elevational view shown in FIG. 3. A left side elevational view is not shown because it is identical to the right side elevational view shown in FIG. 5.
The broken lines framing the dog bone blister for a blister pack is included for the purpose of illustrating environment and forms no part of the claimed design.