Sayyiduna Anas (may Allah be pleased with him) reports from the Prophet (peace and blessings be upon him) that he was asked: "Is slaughter only at the throat and the upper chest (labbah)?" He said: "If you were to pierce it (with an arrow or spear) in its thigh, that would also suffice for you."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Bakr bin al-Shurud, who is da'if (weak).