Abstract: There is disclosed an apparatus for diagnosing milk secretion disorders in animals such as cows. The apparatus is based upon an electric detection of deviations from the properties of a standard milk secretion, and comprises a holder carrying a diagnostic dish divided by partition walls into a number of diagnostic units corresponding to the number of teats of the animal. The diagnostic units are each provided with a measuring probe exposed to the mouths of scavenging nozzles and with a circuit for evaluating the milk quality as by its electrical conductivity. The outlet of said circuit is connected to the inlet of a display indicating, for example, when the quality of the milk in each diagnostic unit exceeds a predetermined value.