Bai Yun has yet to give birth to the second panda cub, but it seems like she's taking good care of the first baby cub that appeared. Zookeepers do not believe the second panda cub will be born.

Bai Yun's first baby, Hua Mei, seen here at five months (collective "Awwwww"), turned 4 on Wednesday. How time passes! For more on Hua Mei.