The clouded leopard cubs born at the Smithsonian Conservation Biology Institute in Front Royal, Va., Feb. 6, are healthy and growing. At nearly two months old, they just received their first vaccinations. As they have grown, their diet has changed to match their appetites and nutritional needs. When the cubs were first born they were bottle-fed by keepers every couple of hours, but they recently graduated from bottle-only feedings. In addition to fewer bottle feedings, they receive four feedings of chopped and cooked chicken meat mixed with a small feline diet. The male cub, pictured here, weighs almost three and a half pounds and his female sibling just over two and a half pounds. The cubs will remain at SCBI Front Royal until they are three and a half months old. They will then move to other zoos for eventual breeding as recommended by the Species Survival Plan. Listed as vulnerable to extinction in the wild, SCBI has successfully bred more than 70 clouded leopards over the past 30 years and is a leader in conservation science initiatives to save the species.