Haptoglobin typing in canine bloods.

Haptoglobin typing by vertical electrophoresis in a discontinuous polyacrylamide gel was conducted on 47 dog blood samples, of which 19 were from Doberman pinschers, 20 from German shepherds, and 8 from pit bullterriers. Two phenotypes were common in the three breeds and could not be used to differentiate between them. Canine haptoglobin phenotypes were, however, sufficiently different from those of humans to warrant using haptoglobin typing as a method for determining the origin of bloodstains.