The ornamental design for a dogwalkingbelt, as shown and described.
FIG. 1 is a bottom plan view of the dog walking belt showing my new design;
FIG. 2 is a top plan view of the dog walking belt;
FIG. 3 is a right side view of the dog walking belt;
FIG. 4 is a left side view of the dog walking belt; and,
FIG. 5 is a front perspective view of the dog walking belt while in use.
The broken line showing of an individual in FIG. 5 is included for the purpose of showing an environment of use of the dog walking belt and forms no part of the claimed design.