Abstract: Baby chicks are loaded in an open top container 32 and the container is moved into an open ended cabinet 18. In response to the movement of the container into the cabinet, a dose of vaccine is emitted through at least one nozzle 42 supported in the upper portion of the cabinet. The spray emitted from the nozzle is of a droplet size large enough to fall onto the chicks in the container substantially without remaining airborne long enough to be inhaled by the chicks.

Abstract: Baby chicks are loaded in an open top container 32 and the container is moved into an open ended cabinet 18. In response to the movement of the container into the cabinet, a dose of vaccine is drawn from a supply 56 and delivered to a pressure chamber 41, and in response to the delivery of the dose of vaccine to the pressure chamber, air pressure is also delivered to the pressure chamber so as to eject the dose of vaccine from the pressure chamber and through at least one nozzle 42 supported in the upper portion of the cabinet. The spray ejected from the nozzle is of a droplet size large enough to fall onto the chicks in the container substantially without remaining airborne long enough to be inhaled by the chicks.