My deepest sympathies
Belle and I are so sorry for your loss. It hurts SO MUCH to say good bye to your love. You have to decide that you are helping your friend cross over to heaven. She'd do the same for you. She's running free and waiting to see you and your family with boxer wiggles. Muffin is waiting to see you to give you many hundreds of kisses. I know she will.
She understands your pain and is grateful to you for easing hers.