Stephen A MacKenzieDr. Stephen A. Mackenzie has been a deputy sheriff for more than 20 years and has been training and handling police service dogs for more than 30 years. A popular seminar instructor, he has testified in both criminal and civil cases as a court-recognzed expert in animal behavior. He is currently a professor of animal science at the State University of New York at Cobleskill. Read More Read Less
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