Since Dolly the Sheep was cloned in 1996, there has been a big ethical debate over what the limits of genetic cloning should be. A company in South Korea is challenging the proverbial line in the sand by offering a $100,000 dog cloning service.
The technology is still in it's infancy and the reason there is a high ethical barrier to doing this is that the success rate for cloning is still not high enough for it to be considered safe or humane. Many of the clones don’t survive because of abnormalities. Some also get put down because the client only wanted one dog and more than one was born.
Another issue is that when you hear clone, you think that the new puppy will be exactly like the old one. However, clones, just like genetic twins, can have different personalities.