Your note brought tears to my eyes and prayers are on the way for Murf as well as you! I have heard the same thing that Sirocco mentioned so it is possible Murf was able to disguise how badly he was feeling. I understand why you are questioning yourself because five years ago I went off to work one morning and gave my beloved black standard poodle at quick pat on the head as I was heading out the door, never dreaming that she would be dead on the sofa when I returned home. It was the most horrible thing I ever experienced. The vet felt it was a heart attack, even though she had no history of heart trouble, but for weeks after I was questioning myself as to her recent behavior. Had she somehow been ill and I never picked up on it? To this day I will never know but how I wish I had not had to work that day and could have been with her. You are doing all you can for Murf and now it is in God's hands. We are here for you!