DOG COLLARS All dogs should have a collar and dog tags! The thought of a loved dog being stolen or lost is not pleasant for anyone, although statistics clearly show that there is a far greater chance of seeing your dog again if they are wearing a dog collar and pet id tag. Although dog collars do not only useful for returning and re-claiming lost dogs. Dogs collars are very useful for walking and exercising dogs and go a long way to showing you are a responsible pet owner.