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Bao Bao, the four and a half month old giant panda, makes her public debut at an indoor habitat at the National Zoo in Washington, Monday, Jan. 6, 2014. Bao Bao, who now weighs 16.9 pounds (7.65 kilograms), was born to the zoo's female giant panda Mei Xiang and male giant panda Tian Tian. (AP Photo/Charles Dharapak) ( National Zoo Panda )

Animal keeper Marty Dearie carries Bao Bao, the four and a half month old giant panda cub, as she makes her public debut at an indoor habitat at the National Zoo in Washington, Monday, Jan. 6, 2014. Bao Bao, who now weighs 16.9 pounds (7.65 kilograms), was born to the zoo's female giant panda Mei Xiang and male giant panda Tian Tian. (AP Photo/Charles Dharapak) ( National Zoo Panda )

In this photo provided by the Smithsonian's National Zoo, a member of the panda team at the Smithsonianís National Zoo performs the first neonatal exam Sunday, Aug. 25, 2013, on a giant panda cub born Friday, Aug. 23, in Washington. The cub appeared to be in excellent health, zookeepers reported after a 10-minute physical exam Sunday morning. (AP Photo/ Smithsonian's National Zoo, Courtney Janney) ( National Zoo Panda )

Giant panda bear cub Bao Bao (R) and her mother Mei Xiang move around inside the David M. Rubenstein Family Giant Panda Habitat at the Smithsonian National Zoological Park January 6, 2014 in Washington, DC. Born August 23, 2013, and weighing nearly 17 pounds, Bao Bao will make her public debut at the zoo on January 18. (Photo by Chip Somodevilla/Getty Images) ( 460948313 )

Giant panda bear cub Bao Bao moves around inside the David M. Rubenstein Family Giant Panda Habitat at the Smithsonian National Zoological Park January 6, 2014 in Washington, DC. Born August 23, 2013, and weighing nearly 17 pounds, Bao Bao will make her public debut at the zoo on January 18. (Photo by Chip Somodevilla/Getty Images) ( 460948239 )

Giant panda bear Mei Xiang grabs her cub Bao Bao by the nape of the neck inside the David M. Rubenstein Family Giant Panda Habitat at the Smithsonian National Zoological Park January 6, 2014 in Washington, DC. Born August 23, 2013, and weighing nearly 17 pounds, Bao Bao will make her public debut at the zoo on January 18. (Photo by Chip Somodevilla/Getty Images) ( 460948315 )

Giant panda bear cub Bao Bao moves around inside the David M. Rubenstein Family Giant Panda Habitat at the Smithsonian National Zoological Park January 6, 2014 in Washington, DC. Born August 23, 2013, and weighing nearly 17 pounds, Bao Bao will make her public debut at the zoo on January 18. (Photo by Chip Somodevilla/Getty Images) ( 460948231 )

Giant panda bear cub Bao Bao moves around inside the David M. Rubenstein Family Giant Panda Habitat at the Smithsonian National Zoological Park January 6, 2014 in Washington, DC. Born August 23, 2013, and weighing nearly 17 pounds, Bao Bao will make her public debut at the zoo on January 18. (Photo by Chip Somodevilla/Getty Images) ( 460948859 )

News photographers photograph Mei Xiang, the mother of Bao Bao, the four and a half month old giant panda, as she eats bamboo at an indoor habitat at the National Zoo in Washington, Monday, Jan. 6, 2014. Bao Bao, who now weighs 16.9 pounds (7.65 kilograms), was born to the zoo's female giant panda Mei Xiang and male giant panda Tian Tian. (AP Photo/Charles Dharapak) ( National Zoo Panda )

Giant panda bear cub Bao Bao (L) and her mother Mei Xiang move around inside the David M. Rubenstein Family Giant Panda Habitat at the Smithsonian National Zoological Park January 6, 2014 in Washington, DC. Born August 23, 2013, and weighing nearly 17 pounds, Bao Bao will make her public debut at the zoo on January 18. (Photo by Chip Somodevilla/Getty Images) ( 460948863 )

Giant panda bear cub Bao Bao moves around inside the David M. Rubenstein Family Giant Panda Habitat at the Smithsonian National Zoological Park January 6, 2014 in Washington, DC. Born August 23, 2013, and weighing nearly 17 pounds, Bao Bao will make her public debut at the zoo on January 18. (Photo by Chip Somodevilla/Getty Images) ( 460949379 )

Bao Bao, the four and a half month old giant panda, makes her public debut at an indoor habitat at the National Zoo in Washington, Monday, Jan. 6, 2014. Bao Bao, who now weighs 16.9 pounds (7.65 kilograms), was born to the zoo's female giant panda Mei Xiang and male giant panda Tian Tian. (AP Photo/Charles Dharapak) ( National Zoo Panda )