Oh, (((((SKY)))))
That is so hard and so painful to do! I'm so sorry for your loss and grief. I am sad with you.
You did the compassionate thing. You cared for him, as he cared for you. I don't think I've ever done that without the second guessing afterward.
I hope that soon the happy memories of your beloved pup will replace the pain and torment in your heart.
ECHOES