A livestock tracking system includes the collection of animal data upon loading of the livestock for transport and the collection of similar data upon unloading, thereby monitoring and tracking same. Livestock is transported from a grouped plurality to individual animals capable of being weighed and then put into transport containers. Each transport container is readily identifiable throughout the process such that upon the unloading of the livestock the information pertaining to the livestock within each container can be compared to data collected upon loading and therefore traced. While the most important data is weight, other measurements may be utilized. A method incorporating this system is also disclosed.