High Altitude, High Hopes, High Stakes. Only 20 blue sheep and 10 Himalayan tahr tags are auctioned annually. However, with tahr live at altitudes of 14,000 feet and blue sheep to 18,000 feet, so there’s a lot that can go wrong. Follow Simon Barr’s journey as he goes on the hunt of a lifetime in Nepal. The reward for success will be spectacular but the risk of failure is high.