Abstract: Ketosis or acetonemia is a common metabolic disease of adult cattle which breeded and managed for high production during early lactation period and late gestation. It mainly occurs in dairy cattle that stop using carbohydrates as a source of energy, instead depending on body fats for fuel to meet their energy requirements of lactation. Mobilization of body fat to the liver releases a high rate of ketone bodies. These bodies diffuse across the cell membrane to supply the body with alternative sources of energy to meet their needs of lactation. These ketones are acetone, acetoacetate and β-HydroxyButyrate BHBA , the body gets rid of them in the urine, fresh milk and exhaled breath. One of the best prevention methods is to detect the acetone level in exhaled breath during Subclinical Ketosis SCK before appearance of clinical signs of ketosis. Based on the above, this study proposed a new design of remotely detection system for ketosis proactive in dairy cattle. When the acetone in exhaled breath is exceeding a certain level from an identified cow, SMS message will be sent automatically to the responsible person. This message includes the cow’s RFID reader tag number and its high Acetone level. The proposed system includes Global System for Mobile communication (GSM) with Subscriber Identity Module (SIM) card connected to the arduino unit to allow SMS message sending. Fast and accurate response with ability of remotely monitoring and messaging is the main merits of the presented system.