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As reported in Packaged Facts, “Pet Food in the U.S.,” the top dry dog food marketers are Nestlé Purina (drawing 29% of purchasers) and Mars (at 19%). Three marketers form a second tier, by this customer base metric: Post, with its purchase of most of JM Smucker’s pet food brands (10%); General Mills, with Blue Buffalo (10%); and Colgate-Palmolive, with Hill’s Science Diet (8%).