The ornamental design for a dogpinchcollar, as shown and described.
FIG. 1 is a perspective view of a dog pinch collar design showing my new design.
FIG. 2 is a front view of a dog pinch collar.
FIG. 3 is a rear view of a dog pinch collar.
FIG. 4 is a left side view of a dog pinch collar.
FIG. 5 is a right side view of a dog pinch collar.
FIG. 6 is a top view of a dog pinch collar; and,
FIG. 7 is a bottom view of a dog pinch collar.
Any shading and cross-hatching are not features of the design but are utilized to illustrate the surface contours of the dog pinch collar design in the drawings.
The broken lines in the drawings depict portions of the dog pinch collar that form no part of the claimed design.