It is narrated from Hazrat Ibn Abbas (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) sent ten sacrificial camels with a man and instructed him regarding them. The man went away. Then he returned to the Prophet (peace and blessings be upon him) and asked, "If any of these animals becomes unfit (for sacrifice), what should be done?" The Prophet (peace and blessings be upon him) said, "Slaughter it, then dip its foot in its blood, then strike it on its skin. Neither you nor any of your companions should eat from it."