It was narrated that Ibn 'Umar said; "I heard the Messenger of Allah say:'May Allah curse the one who disfigures and animal. (Sahih)
Hadith No. 4442
Sunan an Nasai
Gradings:
Abu Ghuddah:
Sahih
Al-Albani:
Sahih
Zubair Ali Zai:
Hasan