Board Thread:False Info and Speculative Discussion/@comment-4723271-20170918140954/@comment-4091815-20170921020145

Halwyn was not dead. He could not heal until the bullet was removed. This fact was first stated in Season One and again in Season Two. Once the bullet was out, he began to heal. Unfortunately, Hellhounds heat up when they heal and the silver casing around the bullet melt, poisoning him. With no way to remove the silver from his system, he can't recover.