2.4 Smart Dairy The secondary occupation of a large number of farmers is rearing cattle for dairy products. The use of sensors and cameras in the barn or shelter can help the farmers in better management of their work. Any changes can be reported instantly through alert messages and required measures can be taken. Favorable temperature for the cattle can be maintained using smart devices. The food, water and health necessities of the cattle can also be monitored in a similar fashion. Grazing the cattle in the open fields is a risky thing if there is no one to supervise it. The use of sensors in the fields can eliminate the job of supervision by a human and it can be done remotely by the farmers.