Abstract: A dispensing device which controls a rate and an amount of discharge of a substance which may be used to treat animals for any number of reasons. The dispensing device has a tank including a top, a bottom and a cover. A movable piston is positioned within the tank, and the movable piston separates the tank into an upper chamber being above the movable piston and a lower chamber being below the movable piston. The dispensing device also includes a dispenser in fluid communication with the tank, and a dispensing head in fluid communication with the dispenser. The dispensing head further includes a plurality of apertures near an outer diameter of the dispensing head.

Abstract: A method is disclosed for increasing the rate at which young poultry will ingest beneficial probiotic compositions effective against bacteria such as salmonella.