As everyone else has said it is okay to cry. I'm in tears just thinking of the decision you have to make. Although I have not experienced it myself, my first dog is now almost 13 and slowing down...I know the decison with her may not be too far off...As hard as it will be to say goodbye to Rufus when he times comes, he will be running happily at RB and you will see him again! And in the meantime...although no dog will ever replace him, there will be many other dogs in your life for you to love and cherish the way you do Rufus now.

We will be thinking of you.