In the July 2000 issue of Atlantic magazine there is an article about dogs being stolen and otherwise unethically acquired by dealers who sell them to medical-research institutions, "From the Leash to the Laboratory." One paragraph states, "The price structure that has evolved puts certain breeds particularly at risk. The most valuable dogs are Labrador retrievers, German shepherds and shepherd mixes, Dalmatians, spaniels, golden retrievers and border collies. Sometimes called 'serum dogs,' owing to backwoods folklore that a serum made from the blood of these dogs could cure cancer, they are prized by labs becaue they have large chests, which makes them preferred subjects for cardiovascular research." Not pleasant reading overall. Linda R. Pacifica, CA