Livestock branding is a technique for marking livestock so as to identify the owner. Originally, livestock branding only referred to a hot brand for large stock, though the term is now also used to refer to other alternative techniques such as freeze branding. Other forms of livestock identification include inner lip or ear tattoos, earmarking, ear tagging, and RFID tagging with a type of microchip. The semi-permanent paint markings used to identify sheep are called a paint or colour brand. In the American West, branding evolved into a complex marking system still in use today.