"Old Working Dogs".Biografía del autor:
David Hancock has been interested in working dogs all his life. His career in the regular army brought him into contact with service dogs and enabled him to study working dogs in many countries. He has written three other books on dogs, " Dogs as Companions, The Heritage of the Dog "and" The Bullmastiff - A Breeders' Guide," and he contributes regularly to Dogs Monthly an other magazines. He judges working terriers and working tests for gundogs.
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