Sayyiduna Zayd bin Thabit (may Allah be pleased with him) narrated from the Prophet (peace and blessings be upon him) about a sheep into which a wolf had sunk its teeth; it was caught alive and slaughtered, and he (peace and blessings be upon him) "ordered that such a sheep be eaten."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيد والذبائح / 18956