“I heard ‘Ubaid bin Fairuz say: ‘I said to Bara’ bin ‘Azib: “Tell us of the sacrificial animals that the Messenger of Allah ﷺ disliked or forbade.” He said: “Allah’s Messenger ﷺ said like this with his hand. And my hand is shorter than his hand:* ‘There are four that will not be accepted as sacrifices: The one-eyed animal that is obviously blind in one eye; the sick animal that is obviously sick; the lame animal with an obvious limp; and the animal that is so emaciated that it is as if there is no marrow in its bones.’” He said:** “And I dislike that the animal should have some fault in its ears.” He said: “What you dislike, forget about it and do not make it forbidden to anyone.” (Using translation from Ibn Mājah 3144)   

حَدِّثْنِي عَمَّا كَرِهَ أَوْ نَهَى رَسُولُ اللهِ ﷺ مِنَ الْأَضَاحِيِّ فَقَالَ قَالَ رَسُولُ اللهِ ﷺ هَكَذَا بِيَدِهِ وَيَدِي أَقْصَرُ مِنْ يَدِ رَسُولِ اللهِ ﷺ أَرْبَعٌ لَا تُجْزِي فِي الْأَضَاحِيِّ الْعَوْرَاءُ الْبَيِّنُ عَوَرُهَا وَالْمَرِيضَةُ الْبَيِّنُ مَرَضُهَا وَالْعَرْجَاءُ الْبَيِّنُ عَرَجُهَا وَالْكَسِيرُ الَّتِي لَا تَنْقَى قَالَ فَإِنِّي أَكْرَهُ أَنْ يَكُونَ نَقْصٌ فِي الْأُذُنِ وَالْقَرْنِ قَالَ فَمَا كَرِهْتَ فَدَعْهُ وَلَا تُحَرِّمْهُ عَلَى غَيْرِكَ  

[Machine] If it happened to it after you bought it, then deal with it. And if it happened to it before you bought it, then replace it.  

إِنْ كَانَ أَصَابَهَا بَعْدَ مَا اشْتَرَيْتُمُوهَا فَأَمْضُوهَا وَإِنْ كَانَ أَصَابَهَا قَبْلَ أَنْ تَشْتَرُوهَا فَأَبْدِلُوهَا