Here are some pictures of Dreamer's instinct test (click the thumbnails for full-size pictures):

Here's Dreamer's approach to the sheep. Note that the sheep are already registering her authority (look at their ears).
Dreamer is getting more confident and has ramped up both power and speed.
Getting ready for her first "hit" -- she's pushing in to get a quick nip or grip on one of these sheep.
Still not satisfied, she's pushing harder and harder.
This picture reminds me of a barracuda -- she's not sure how fast she wants to go, but it's probably faster than she's going now!