Polishtatra,

I don't know about the CO.  I know I've had experience with other livestock guardians.  I discovered several of them were easily put off a behavior if the handler corrected them at the wrong time.  My Great Pyrenees were fabulous but they did not display the kind of full out combat mode like I have read in the CO.  They were actually quite easy to correct by tone of voice alone.  But if I didn't read them well & corrected at the wrong time & did so consistently I know I would have ruined them for working dogs.  As it was they were wonderful farm dogs & could be trusted unrestrained when the UPS, postal carrier, delivery people, etc... came to the house.  They warned & barked fiercely, when I came out they cued off my response.  If I call out to the visitor in a friendly manner all's well.  They huff & gruff & go on about their duties.  If I said something like, "can I help you?" the boys would move to either side of the visitor & wait.    There have been a couple other livestock guardian breeds I've worked with who weren't as easily bothered by handler mistakes but my Pyrs were.