It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that eating the flesh of a carcass is forbidden, but its skin, teeth, bones, hair and wool are lawful.
(b) Ali bin Umar (al-Daraqutni) (may Allah have mercy on him) said: Abu Bakr al-Hudhali is a da'if (weak) narrator.
(c) Yahya bin Ma'in (may Allah have mercy on him) said that only Abu Bakr al-Hudhali narrates this hadith from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both): that he disliked the flesh of a carcass, but as for its teeth, hair and leather strips, there is no harm in them.
(d) Yahya bin Ma'in (may Allah have mercy on him) said: Abu Bakr al-Hudhali is not a proof.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 81