My dad is putting my dog down this week. Murphy is an almost 14 year old chocolate lab and unofficially has congestive heart failure. He is very healthy for his age but has some trouble breathing if he gets too worked up and has had a few "episodes" where he can't catch his breath, has foam coming from his mouth, and poops at the same time. He has been my dog from the time we got him when I was about 4 and has been my best friend and almost a brother to me. My dad wants to know if I want to be there when he goes to put him down. I don't know if I should be with him or if I should avoid a possibly traumatic moment when he dies. I don't want to abandon him and make him possibly feel alone and like he is being punished for something, but at the same time, I don't want one traumatic, bad moment at the end to possibly overshadow all the good times we have shared. I'm crying just trying to type this. Please help.