Hadith.3048 - The Messenger of Allah سبحانه وتعالى (peace and blessings be upon him and his family) said:
"A lame animal with a clear limp, a one-eyed animal with evident blindness, an extremely thin animal, a mangy animal, a maimed animal, or one with a broken horn should not be offered as a sacrifice."
It refers to the one with a broken horn and the one with a cut ear.