When you are faced with the fact your dog has died from something, either cancer or old age or an accident. You miss that companionship, and that special relationship you had with that four footed friend.
I wanted to have my akita cloned, he was such a wonderful guy.
I lost my 5 yr old sharpei/hound mix due to that crap tainted dog food and stuff from China. She didn't deserve to die, and suffered for weeks while the vets tried to figure out what was going on with her. I then lost my 10 yr old heeler to cancer less than 6 months later.
I got lucky, I found another sharpei mix and adopted her. And we found the full sister to another dog we had pass on due to a brain tumor, so we adopted her.
BUT as a dog person who has grieved, too much. I understand why these people want to do that.