I put down my 14 year old pit bull 2 years ago and it still hurts. He was the best friend I ever had, he was there when I graduated high school, graduated the university, got married, got into fights with the girl/wife, ... Well he and I were very close. He developed a cancerous tumor on his hind legs that spread through out his body. We had to put him down and that by far was one of the most hardest things to do. At least he is not in pain anymore and is resting in peace.