Precision farming technology, which uses sensors to help manage farm operations, is at an early stage of adoption in livestock production. Recent advances in cost, quality of equipment, machine learning/cloud-based systems and the fact that skilled farm labor is becoming more difficult to find are factors that have generated additional interest from livestock producers. One feature most precision livestock farming capabilities share is the ability to operate continually without regular human intervention. That allows farm staff to monitor individual animals and focus on activities such as administering treatments or assisting in maternity instead of routine tasks like pen watching. Reviewed in this article are various aspects of precision livestock farming technology and the perceived impact on livestock health and farm labor for dairy and swine farms.