A flock of sheep into a mystery crop circle

As you can see, it is a photograph of the moment of impact that almost 100 flocks of sheep are turning circling around a circle of mysteries. I will follow the secret of the mysterious phenomenon for what reason this is done.

Details are as below.
Forget crop circles - now we 've got a mysterious SHEEP circle | the Daily Mail

This photo was taken by photographer Russell Bird successfully. I was wondering what happened and what was going on, and as I was watching, the farmer who came on the tracker came over and started to feed, it seems that this circle collapses.

As it was a phenomenon that was too unknown, when asked experienced persons who are familiar with sheep breeding, it was said, "Is not she just putting sheep's food on the circle?"

How truth or how.