The stillborn cub was also a girl fathered by Tian Tian, the National Zoo’s male panda.

Meanwhile, Mei Xiang and Butterstick are doing well, cuddling and bonding in a den.

Butterstick II is doing just fine, says National Zoo.

“As opposed to Sunday, today she positioned her body and her cub so that panda keepers couldn’t reach the cub.”

National Zoo keepers experience “five minutes of pure terror” before they realized the stillborn panda cub discovered late Saturday night was not Butterstick II.

After relaying the sad news of the stillborn panda cub, the National Zoo says Mei Xiang’s living cub is “robust, fully formed and is a bright, healthy shade of pink.”

“Mei Xiang picked the cub up immediately and began cradling and caring for it,” the National Zoo said in a release.