PROBLEM TO BE SOLVED: To provide feed material containing hydroxyapatite.SOLUTION: Water and sulfuric acid are added to and dissolved into combustion ash of poultry bone, fish bone, or livestock feces such as poultry manure, swine dung, or cow dung, solid-liquid separation is performed, and calcium chloride is added to its filtrate to be stirred. Solid-liquid separation and filtration are repeated, slaked lime is added to its filtrate to be stirred for solid-liquid separation, the obtained hydroxyapatite in a wet (water-containing) state is dried by warm air blast, and a dried product of hydroxyapatite-containing feed material is obtained.【課題】ヒドロキシアパタイトを含有してなる飼料原料を提供する。【解決手段】鶏家畜の骨、魚骨、又は鶏糞、豚糞、牛糞等の畜糞燃焼灰に水と硫酸を加えて溶解し固液分離を行い、そのろ液に塩化カルシウムを添加攪拌し固液分離とろ過を繰り返し、そのろ液に消石灰を添加攪拌して固液分離し、得られたウェット（含水）状態のヒドロキシアパタイトを温風送風乾燥してヒドロキシアパタイト含有飼料原料の乾燥品を得る。【選択図】図１
