John, Sorry to hear you are going through this. It is a difficult thing but for me, if I know it is the end of the road for my dog, I would put him to sleep to end his suffering. Based on your description of Buddy it sounds like he is not enjoying life too much these days.
I have unfortunately put down quite a few dogs and all of them have been very peaceful with no suffering at all.
I have unfortunately put down quite a few dogs and all of them have been very peaceful with no suffering at all.