Sayyiduna Zayd bin Thabit (may Allah be pleased with him) said that a wolf sank its fangs into a sheep, then they slaughtered it with a sharp stone, and the Prophet (peace and blessings be upon him) "permitted eating it."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيد والذبائح / 18955