Down on the ground, their mother's body heat could help them keep warm.

Up here, their small bodies are struggling to generate enough heat.

They're shivering so hard they can barely hold on.

Eventually, Jewel seems to understand the situation.

She calls the cubs down.

Herbie and Fern gingerly make their descent.

It's slow going in the cold.

A slip could kill them.

Jewel urgently needs to get the cubs close, warm them up, and protect them from the storm.

But incredibly, instead, she moves off, leaving her frozen youngsters to struggle after her.