A dog ID tag is a hanging label attached to a dog collar used for identify a particular dog. Usually made of metal and plastic, it comes in different colors, styles, and shapes. It contains information on the identify of the dog such as its name, its license number and the licensing organization's number, and its owner's name, contact number, and address. It can also contain the dog's medical information such as rabies vaccinations and other critical medical issues. It can also display information about the dog's behavior.