is halal deer antlers which are harvested from a living anmal?

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.

There are different opinions regarding the ruling of such antlers. The most preponderant of them is that they are pure, whether they are taken from a living or a dead animal. 

That is because they are included in the parts that life exists in it, and this kind of life is a life of growth like that of the plants not a life of sensation like that of the animals as stated by Shaykh Al-Islam Ibn Taymiyyah . Moreover, they do not have flowing blood that renders them impure and this is exactly the case of the hair.

Allaah Knows best.