Abstract: A low maintenance, electrically controlled automatic spray bath employs a spray system to wash animals and subsequently deliver treatment and prevention products at a continuous, consistent dosage rate. The automatic spray bath comprises at least one component. Each component comprises four rails defining an enclosure through which animals are walked in one direction, one after the other. Each rail of each component has a plurality of nozzles. When one component is employed the nozzles are divided into sets. Each set of nozzles sprays either a cleaning fluid or a treatment fluid. When more than one component is employed, the nozzles of each component spray either a cleaning fluid or a treatment fluid. The components are modular and portable. As animals are led between a set of nozzles, an electric eye beam is broken, causing a check valve to allow liquid to flow from a remote reservoir.