Two months ago I had to sit here and watch our Boxer die. It was my husbands dog, he couldn't make the decision and I offered to take Him to the vet for him. Dozer suffered terrible for 5 days, nothing anyone could do, he had a hole in his heart. We knew from the time he was 1 yr old that he wouldn't be with us long. Against Vet's advice, when he had an attack, we would calm him. We were told to just let him alone, let him die. We couldn't do that. He lived 5 good years and my husband watched him die right in front of his eyes. He learned a lesson that will haunt him the rest of his life.
I thought I would share, maybe it will help ease you pain.