The need to add a series of chemicals to the water and food feeding animals (poultry, pigs, rabbits, etc.) makes it necessary the usage of dosing systems in modern farming systems. As it comes to food, precision and reliability of the products are mandatory in this type of application. In this regards, Etatron DS SpA products represent an ideal solution to inject the chemical in the inline dispenser or conveyors so that to treat the pipeline water and get the livestock properly medicated and/or fed. In particular eOne series, which automatically adjusts the dosage as the pressure in the hydraulic pipeline varies. These pumps can be controlled by a pulse-throwing counter, by a measuring instrument or by a PLC, allowing a dosage proportional to the water flow or to the measurement value of the chemical parameters.