By law all cattle in this country must have 2 ear tags.
Each animal must have 2 tags in case they lose one of them.
The tags have a number which consists of 2 parts.
The tag has a herd number on it which identifies the animal’s place of birth.
The second number on the tag identifies the individual animal.
This identification number is printed on a passport by the British Cattle Movement Service.
If cattle are sold to another farm the animal’s passport must be transferred to the new farm.
This system was put in place, following the BSE scare of 1996, so that the movement of cattle can be traced along with the ancestry of each animal.
The Government keep this information on a computer system.