Moocall Calving Sensor Device is put into place by the Farmer when he believes the cow is close to calving. It automatically sends an SMS text alert notifying the farmer directly to their mobile phone an hour before the calf is due to be born allowing the farmer to be present during the calving and to assist if required. Moocall Heat System The Moocall Heat System includes a collar worn by a bull and RFID tags which are attached to each cow/heifer. Our collar then monitors the bull’s activity among the herd and with individual cows. It then accurately notifies the farmer of standing heats by SMS and through an app.