Never! The dog would look the same, but would'nt have the same personality, or anything else. Having the same phenotype (appearance) is as far as cloning goes. There are already too many homeless dogs. Get one of them. No body needs to be bringing more dogs into the world. If you have a purebred german shephard, adopt one that looks like it. Id would be the same as cloning. It would look nearly the same, and would'nt know you or act the same like a clone would. Its like the lady that paid oddles of money to have her cat cloned. Why? Its not your cat. It just looks like it.
Buster, 11 weeks