Seattle's Woodland Park Zoo Lion cub quadruplets just turned two months old and that meant it was time for a vet check. Each cub was carried to the exam table by keepers, held just like their mother would, as that comforting position relaxes them.

Now weighing in at 21 to 23 pounds (9.5 to 10.4 kg) each, the wriggly babies are getting harder to handle, so each were anesthetized for a part of this latest checkup. One cub gave a healthy hiss to the immobilizer mask!

Each of the cubs has most of their baby teeth, which means they are starting to sample solid foods like ground turkey and raw beef. Vets noticed that their little tummies felt less full than they did at their last exam, which is likely because now that they eat some solid foods, they aren’t filling themselves up on mom’s milk as much as they used to.

Each were measured from head to tail to track their growth. All are on target, a positive sign that the zoo can start planning for their debut when outdoor temperatures reach a minimum of 50 degrees. Until then, they’ll continue to live in an off-view maternity den where they can bond and develop in a more controlled environment.

Photo Credit: Photo 2,3,4,5,6: Kirsten Pisto/Woodland Park Zoo, Photo 1, 7,8: Ryan Hawk

After the exam, the cubs were soothed by keepers as each woke up. They were then returned to their mom Adia.

See a video of these babies in action, find more pictures of the cubs and read about the species and conservation efforts to save them after the fold.