I had to do this 2 weeks ago for our 14 yo Collie Alex. I could not believe I would ever get so attached to an animal.
Very sorry to hear this. :-( You have my sympathies, wordsofearnest.
My prayers are with you for your grief. As I said before I do not look forward the the day i will have to take Hershee for that one way journey to the only building in town that will allow her to enter.