Description All raw material beef bones and beef treat products come from the 5th largest beef producer in the nation and are a part off the HeartlandPremium, LLC family. All material is inspected daily.Only organic complaint smoke flavor is used. Made with wood and water only from their supplierOnly 100% USDA highest quality beef is usedNo chemicals, synthetics, preservatives added to treatsProduct derived from cattle 29 months and younger, which is whyButcher's Block Bones do not splinter