You can't, Rob. We went through the same thing. Had a beautiful, motherly Dobe, and what a friend named one day when I was walking the dogs: "Oh, you have one of those." We finally had to put down the "one of those" when her hip aplasia became so painful that she couldn't walk. Then, one evening the Dobe unexpectedly put her nose on my lap and said, "I love you," went to my wife and said the same thing, went outside through her doggie door and, as soon as she got outside, had a heart attack or a stroke. You can't replace dogs like those, though you might be able to find a new love.