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The Dallas Zoo welcomed the birth of two critically endangered Sumatran tiger cubs on December 6, and said it was “thrilled to be able to contribute to the population once again with these adorable new additions.”

The cubs, who were yet to be named, were born to mother Sukacita (“Suki”) and father “Kuasa,” the zoo announced in a press release on December 27.

Due to their mother’s “milk production issues” the cubs were unable “to nurse properly” and were receiving “around-the-clock care” from carers, the zoo said.

“With only an estimated 400-600 Sumatran tigers remaining in the wild, each birth is a major win for this critically endangered species,” the zoo added. Credit: Dallas Zoo via Storyful