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An expert in how humans interact with animals will speak at 7 p.m. Friday in Canisius College’s Montante Cultural Center, 2001 Main St., in a program sponsored by the Institute for the Study of Human-Animal Relations. His talk, “Why Do Humans – But Not Other Animals – Keep Pets?,” is free and open to the public.

Harold Herzog, professor of psychology at Western Carolina University, has studied human-animal interaction for more than 20 years, including the psychology of animal activism, the moral thinking of cockfighters and the impact of pets on human health.

Author of more than 100 articles on the topic, he writes the blog “Animals and Us” for Psychology Today magazine. His book on human-animal interactions, “Some We Love, Some We Hate, Some We Eat,” has been translated into eight languages.