Aww, Nook, poor guy. Don't be so hard on yourself, you'll know when the time is right. I know how difficult it is, you don't want him to be in any pain but you don't want to give up a few extra days you can have with him. He seems like such a happy boy, and he knows how much he is loved, I truly believe that he'll let you know when he just can't go on any longer. ((((((hugs))))))