It is primarily by the behavior it is possible to know if there are stray voltages. Indeed, the first symptoms in dairy cows are, for example: nervousness, uneven milking, milking time elongated, bucking, chronic mastitis, increased projection rate, high number of somatic cells and a reduction of water consumption. In pigs, the symptoms are aggression, nervousness, cannibalism and a reduction in water consumption. Other factors can cause these unwanted behaviors, but if in doubt, it desirable to do an analysis to see if there are stray voltages. Please be aware that transient voltages sources can be internal or external to the building.