Authentic
Sunan Ibn Majah 3105
“If any of them becomes unfit and you are afraid that it will die, then slaughter it, dip the sandal (tied around its neck) in its blood and place it on its side, but neither you nor any of your companions should eat anything from it.”
" إِذَا عَطِبَ مِنْهَا شَىْءٌ فَخَشِيتَ عَلَيْهِ مَوْتًا فَانْحَرْهَا ثُمَّ اغْمِسْ نَعْلَهَا فِي دَمِهَا ثُمَّ اضْرِبْ صَفْحَتَهَا وَلاَ تَطْعَمْ مِنْهَا أَنْتَ وَلاَ أَحَدٌ مِنْ أَهْلِ رُفْقَتِكَ "