Sayyiduna Najiyah al-Aslami (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) sent his sacrificial animal (hady) with me and said: "If it is about to perish, slaughter it, then dye its sandals (hung as a garland) in its blood, then leave the space between it (the sacrificial animal) and the people."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10253