Just read all the threads to this post. My heart goes out to you and Buster. It was nice to read that he is doing better at this point and time. Reading that you posted you enjoy hearing him barking again, just makes me think of the times my YT barks and that it can get irritating at times. I shall certainly look at it differently now - at least he is able to bark with no problems. Amazing what we take for granted!!
So glad that Buster isn't in any pain and that he has you to be by his side and give him everything possible to make the rest of his stay here the best!!
Wishing you and Buster much time to love each other. You are both in my thoughts and I hope for a miracle here!!!!!!!! All the very best

Keeping positive thoughts going here in BC Canada