The use of water for healing and rehabilitation of animals dates back to ancient times. The ancient Greeks and Romans were already using seawater to treat horses and combat injuries in military animals. Founded in England and the United States in the 1980s, modern hydrotherapy for dogs has spread around the world. Today there are specialized hydrotherapy facilities with special underwater treadmills, whirlpools and pools, with different types of equipment to maximize the benefits of therapy.