reported PEOPLE.“All of us are heartbroken over this tragic loss, especially our amazing animal health and care teams who love and care for our animals on a daily basis,” wrote Kallao. “K2 was very vocal, energetic, loved his toys and was a joy to be around. He always made us smile.”Many of the Mirage’s staff had been working with K2 since his birth and “watched him grow” into an adult, Kallao said.An exact cause of death has yet to be determined however, the casino is working with several pathologists and veterinarians to ensure the well-being of the remaining animals.