Herding Dog?

Oldest has allowed me to start working with Ivy in herding the sheep.  Ivy is a very nervous dog and often is easily frightened so I wasn't sure if she was up for the challenge or confident enough to complete the task.  However, I've been putting her in the sheep's pen a couple times to keep them back while I feed one or two and she has shown remarkable confidence.  Even when the ram challenges her.  She might have potential after all.