Hardest thing I ever had to do was make that same decision. She was 14 years old, I feel your pain. My biggest problem I had was I felt guilty for hurting so much for the loss of my dog when there are so much more important reasons for feeling the hurt. Then a fellow Tradgang friend told me. Do not feel that way because, Toby was a gift from our savior Jesus Christ. A gift that we are responsible for just the same as any gift God would grant us. You grieve your pooch my brother and listen to your heart, time will heal your sorrow but you will never forget the gift god gave you and your family. Remember the great time you had and never forget.