Abstract: A controlled cold therapy apparatus for treating body portions of an animal. The apparatus includes an appliance configured to fit over the body portion to be treated such that substantial total surface area contact is obtained between the body portion to be treated and the appliance. The appliance is comprised of a liquid impervious material which includes a liquid supply connector and a liquid return connector opened to internal flow channels to enable cooled liquid to be circulated through the appliance in a U-shaped flow pattern. The appliance is surrounded by an insulating jacket and is preferably secured around the body portion to be treated by hook and loop fastener strips. The apparatus further includes a liquid control station which circulates cooled liquid through the appliances connected thereto. The liquid control station may be a portable unit or a central fixture unit incorporated into a structure for treating multiple animals at the same time.