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Humphries is also an authority and prolific writer on canines. He authored "The Doberman Pinscher", has lectured at a national seminar on the practical use of canine genetics, and was nominated for an award at the Dog Writers Association of America for an article in the 2007 September/October issue of The Doberman Ring titled, "Inbreeding: Challenging the Myths in Animals and (Gasp)…Humans." Beginning in 1966, Humphries has bred many champion Doberman Pinschers under the "Bikila" prefix (named after the great Ethiopian marathon runner, Abebe Bikila) in Australia and the United States. He began writing regular articles in a column titled "Dogs on Parade" for The Sun-Herald in Australia in the early 1970s, and for 40 years has written articles in American magazines including the "Doberman Quarterly", the "Doberman World", the "Doberman Ring", and the "Doberman Pinscher Magazine", on the genesis and history of the Doberman breed; genetics, science and diseases; breeding in general; and humorous observations of the dog show world.