Two male Sumatran Tiger cubs at Jacksonville Zoo and Gardens had a big week: they received their first round of vaccinations and were named!

Born on November 20, 2017 to mom Dorcas and dad Berani, the two male cubs are growing well and appear to be in great health. You first met the cubs here on ZooBorns.

The larger of the two cubs weighs 14 pounds and is named “Rocky.” His slightly smaller brother, who weighs about 12 pounds, was dubbed “Jaggar.”

Photo Credit: Jacksonville Zoo & Gardens

The zoo’s veterinary staff gave each feisty cub a physical exam, including weighing the cubs, checking their eyes, and inspecting their tiny canine teeth. They cubs were vaccinated against respiratory infections and feline distemper – the same vaccinations given to house cats. Each cub was also microchipped for identification.

While the animal care team can be “hands-on” with the cubs, they never interact directly with adult Tigers. Thanks to daily training sessions that build trust between the animals and the care team, Dorcas voluntarily moves to an adjoining pen while the team examines the cubs.

Over the next two months, the cubs will receive two more rounds of vaccines including boosters and a rabies vaccination.

The now six-week-old cubs need to grow bigger before they are able to explore the outdoor habitat of the public viewing areas. Until then, a live-streaming video of the cubs in their behind-the-scenes nursery den is available on the Zoo’s YouTube channel.

Rocky and Jaggar spend much of their time nursing, sleeping, or being groomed by mom. Each day, the cubs are becoming more mobile and playful, much to the delight of faithful “cub cam” viewers.

See more photos of the cubs below.