Randy, I agree with your assumption regarding Darrin. As I stated in my second post, I am sure he had already formulated a plan and implemented it. But, it is a serious topic about a non-retriever breed with which I have some experience.
Susan, your point is well taken that a post is out there on the Internet for all to see. That is why I post thoughtfully, and when I feel like I have something to offer, and when I will not be redundant. I stand by what I posted.
In fact, there is a lot of good advice on this thread. The common denominator being that this is serious and that anyone facing this situation should take it seriously and act quickly. Whether it is rehoming the dog, seeking expert training, or changing the pack dynamic, the owner must pick and follow a course of action quickly and decisively. It is possible that someone monitoring this thread might see your post as disqualifying of other's posts; and, that would be unfortunate.
My wife and I delegate the protection of our flocks to livestock guardian dogs. We see, on a daily basis, the tasks these wonderful dogs are capable of handling. We also see the problems that can present in this breed. We see the numbers of LGDs that have to be rescued and rehomed. This is why I have responded so passionately, not recklessly, to this thread.