It was narrated from Ibn ‘Umar that the Prophet (ﷺ) said: “Whatever is cut from an animal hen it is still alive, what is cut from it is Maitah (dead meat).”
It was narrated that Tamim Dari said: “The Messenger of Allah (ﷺ) said: ‘At the end of time there will be people who will cut off camels’ humps and sheep’s tails. But what is cut from a living animal is dead.’”