Abstract: A chicken or fowl grow out facility utilizes a ventilated floor assembly including a ventilated floor through which liquid and gas can flow, but which retains manure and other solids deposited thereon, and a bottom floor plenum underneath the ventilated floor. A liquid and vapor barrier sheet preferably covers the ground surface underneath the floor assembly which together insulate the high temperature of the grow-out facility from the heat sink effect of the lower temperature ground. Conventional tunnel ventilation of the chicken house through the ends of the house creates a negative pressure inside the house relative to the outside environment which is vented to the floor assembly plenum. As a result of this tunnel ventilation and negative pressure, moisture in the manure from urine and otherwise evaporates into the air in the growth chamber and floor assembly plenum to effectively keep dry the manure retained on the floor and reduce ammonia formation and pathogen growth.

Abstract: A vaccine spraying apparatus for vaccinating day-old chicks that includes a vaccine container with an agitation mechanism for mixing vaccine and diluent through controlled agitation. Vaccine is drawn from the container by a volumetric pump and dispensed through a plurality of spray nozzles mounted over a conveyor. Chicks contained in trays are moved along the conveyor to pass under the spray nozzles. The volume and orientation of the vaccine spray is controlled by a digital micro-control unit receiving data from a tracking device adjacent the conveyor that senses the position and speed of the trays.