"They're incredibly agile... they start climbing the very first day," said zookeeper Penny Smith. "They do 'up' much better than they do 'down' for the first couple of days."

The lambs are staying pretty close to their moms, and the other females-known as "ewes" (pronounced "yous") help with occasional babysitting.

The king of this mountain is definitely "Ridge," the only ram in the group.

"Our ram has it pretty good here," Smith said. "You know with all the ewes that they want...in the wild they would have to compete with other rams."

Dall's sheep are native to the arctic and sub arctic mountain ranges of Alaska, and the Yukon Territory in western Canada. Expert climbers, these animals inhabit steep, rugged cliffs - like their habitat here at the Denver Zoo - which helps them to elude predators. Happily these sheep are not endangered, mainly because their habitats are so remote.

Dall's sheep feed mainly on grasses in the region, with food supply varying throughout the year. At the Zoo, Smith tells us keepers will let the moms take care of the little ones for a few more weeks, before staff will start medical checkups on them to make sure they are in perfect health.