It is narrated from Hazrat Abu Saeed Khudri (may Allah be pleased with him) that once I bought a ram for sacrifice. By chance, a wolf came and ate a portion of its haunch. I asked the Prophet (peace and blessings be upon him) (whether it could still be sacrificed or not?). The Prophet (peace and blessings be upon him) said: Sacrifice this very one.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 11820
Hadith Gradingحکم دارالسلام:إسناده ضعيف لضعف جابر الجعفي، وجهالة محمد بن قرظة الأنصاري