This is an old saying that many of us have grown up hearing since we were children, but the problem is improving on an invention that has been around for years. This is especially true for simple inventions like the common pet identification tag, or dog tag as it is normally referred too as. The pet identification tag has been a staple of our society for hundreds of years as a way to identify the owners of a particular lost pet, but it was not until World War I that the pet tag became famous and picked up its moniker as the