Zookeepers made one big change to her birthday cake this year.

See how all the new features come together to provide proper enrichment for these pandas.

It's panda birthday week at the San Diego Zoo.

It's probably not a cake you would enjoy, but Bai Yun can't get enough.

Also: zookeepers manage to get an ultrasound on a pregnant panda, and celebrate a panda's third birthday.

See what goes into making this wintry experience a reality.

A research program examines how human disturbance and noise impacts giant pandas, both in the wild and at the zoo.

When a bear really likes something, they'll partake of it in the customary fashion, i.e. rubbing it all over their head.

This little guy has a ton of energy.

See his story from birth to present, and learn the meaning behind his name.

Mr. Wu is definitely a thinker, more than a doer, compared to his siblings.

Pandas are notoriously curious, and today is no exception.

Learn what goes into the process of a unique form of enrichment at the San Diego Zoo and what makes this cake special.

One focus of the research program is to better understand how human disturbance and noise might impact giant pandas, both in the wild and at the zoo.

Featuring all new climbing material, logs, and lush plants, it's everything a panda could love. See them put on a great show.

Meet Xiao Liwu, a giant panda born at the San Diego Zoo.

See Xiao Liwu tear into his presents at the pirate-themed party.

"Surprisingly, he's really strong, even though he looks nice and cute," said resident Veterinarian Matt Kinney at San Diego Zoo.

Meet Xiao Liwu, a giant panda born at the San Diego Zoo.

The incredible treat is made of ice and bamboo, bamboo leaves, apples, and drizzled honey.

See Xiao Liwu tear into his presents at the pirate-themed party.

The 3-year-old panda also got an amazing two-tiered ice cake for his big day.

How would you like a frozen bamboo cake on your birthday? Well, if you're a panda, you might like it quite a bit.

At the San Diego Zoo, zookeepers and researchers are constantly gauging the pandas' behavior to see how well they're doing.