Two grizzly bear cubs arrived at Cheyenne Mountain Zoo earlier this month as permanent residents after they were orphaned in the Montana wilderness.

The unnamed, six-month-old cubs were born sometime around the new year and were transported to the zoo when their mother was euthanized after having too many human interactions; the latest, confirmed livestock depredation, according to a news release from the zoo.

“For us, it’s bittersweet, because although we have high hopes that we can give these young cubs a great life here, we ultimately want wildlife to be wild,” said Rebecca Zwicker, animal care manager in Rocky Mountain Wild. “The folks who work at these wildlife agencies are heroes in my opinion. They want the same thing – for wildlife to live safely in the wild.”

The cubs arrived on June 7 and weighed about 30 pounds each, and have since been growing and getting comfortable in their new home.

“These are the youngest grizzly cubs the Zoo has cared for in decades, and the first orphaned grizzlies to arrive in more than 20 years,” the news release stated.

The cubs join the Cheyenne Mountain Zoo’s 21-year-old grizzlies, who arrived at the zoo around the same age after having too many interactions with humans.

The zoo’s press release described the cubs to be rambunctious and curious and stated that they are settling in nicely. The grizzlies remain on quarantine and will be ready to meet zoo guests later this summer.

“One cub seems to be a little bolder than the other and is usually the first one to approach staff or shift into the other den when we ask them to move so we can clean or replenish enrichment,” Zwicker said in the release. “We see them engaging with each other and playing, climbing, cuddling and exploring together.”

The sex of the cubs is unknown and will be found out at their next checkup appointment in several weeks. The zoo will announce more about naming the cubs after their sexes are known.