Kautilya's Arthashastra 2.29.25

2.29.25

kāraṇamṛtasyāṅkacarma gomahiṣasya, karṇalakṣaṇam ajāvikānām, puccham aṅkacarma cāśvakharoṣṭrāṇām, bālacarmabastipittasnāyudantakhuraśṛṅga.asthīni cāhareyuḥ //

When an animal dies a natural death, they shall surrender the skin with the brand mark, if it is a cow or a buffalo; the skin together with the ear (karnalakshanam) if it is a goat or sheep; the tail with the skin containing the brand mark, if it is an ass or a camel; the skin, if it is a young one; besides the above, (they shall also restore) the fat (vasti), bile, marrow (snáyu), teeth, hoofs, horns, and bones.