Light Sussex hens raised on free range for natural selection at the Institute's Huancayo high altitude farm 3,400 meters in the Andes. They belong to grandparent stock. Only third generation of selected sock is bred commercially. - - FAO/UNDP Project. The Peruvian Veterinary Institute for Tropical and High Altitude Research was set up by the Peruvian government, the United Nations Development Program (UNDP), which aided with financing, and the Food and Agriculture Organization (FAO) of the United Nations, which supplied technical experts. The Institute makes extensive studies in the breeding of poultry under conditions that are normally considered unfavorable for chicken raising. Llamas, alpacas and vicunas and are also studied here.