KAZIRANGA, INDIA - APRIL 13:  Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge feed baby elephants during a visit to the Centre for Wildlife Rehabilitation and Conservation, at Kaziranga National Park on April 13, 2016 in Guwahati, India. The Duke and Duchess of Cambridge are on a week-long tour of India and Bhutan taking in Mumbai, Delhi, Assam, Bhutan and Agra.  (Photo by Arthur Edwards - Pool/Getty Images)