Guest Editor's Introduction: Applications of Machine Learning

An improved horse therapy spa unit is provided which comprises a unitary housing which defines a preferably open-topped water-tight horse therapy compartment and integral hot water and cold water chambers on opposite sides thereof. A water heater and a water refrigerator are disposed in the housing. Water circulation pumps, valves and conduits interconnect the chambers, heater, refrigerator and horse therapy compartment. A water aerator is included in the circulation system and upper and lower sets of jet spray nozzles are positioned in the walls of the therapy compartment. A control panel on the outside of the housing controls the circulation and temperature regulating systems. A hand-held pulsed jet spray unit may be included in the housing, as may radiation lamps disposed in ports in the therapy compartment, a container for medicine and/or disinfecting chemicals, a feed bag and a feed storage compartment. The front end of the therapy compartment is curved to allow the horse to rest its neck, and side ramps are provided on the exterior of housing to aid handlers in guiding the horse and administering treatment thereto. A filtration system removes gross solid refuse and also finer refuse particles from the therapy compartment. The housing is portable and adapted to rest on the ground in a stable position, the water chambers acting as ballast. Retractable wheels are connected to the housing to permit easy transportation of the spa to locations where needed.