Feel sorry for you and your family mate..
Bugger of a thing to have to do.
Shame they cant live as long as us cause like ive said before, they are the best people.
But he will be pain free and you will have all those memories of him to keep forever.
I can feel your pain heaven-sent..
And don't be ashamed of crying buddy.
Cause I know I cried for about a month when I had to put my last dog down..
It's hard to deal with at first but the pain slowly heals...
Try and keep your chin up..