This dog was lost for 3 years and was found 120 miles away from home. This is good example why you need your pet microchipped. A microchip implant is an identifying integrated circuit placed under the skin of a dog, cat, horse, parrot or other animal.
A similar story were also in the news when a lost cat was returned to its original owner after 9 years because the cat was also microchipped.
If you are a pet owner have your pet microchipped just in case this situation happen to you as well.