Sorry if I stole your thunder ;-} I just received this today and thought it worth sharing.
It's been out there awhile, I 'm glad you posted it, it needs to become popular in the culture.
For me it helped clarify something I've always been a little confused by.
Since my childhood I've always enjoyed weapons, and violence, and danger, just like the bad guys (even more really) but I was never a bad guy.
Luckily for sheepdogs there is a never ending supply of gangsters, tough guys and bullies.
I have found that in most situations between a sheep and a wolf, a good sheepdog can do something as simple as calmly but purposefully walking into the wolf's space in a deliberate way and simply say hi! and it stops the trouble.