ugh wrote:
However, The dog gets in some kind of defense mode and tries to bite some of my kids friend. Only some of the boys. What's up with that?
My guess it is associated with the way those kids move. Are these kids more hyperactive or have more erratic movements than the ones that do not elicit a reaction for your dog? You need to learn to recognized the behaviors in some kids that trigger the reaction, learn to recognize the cues in the dog prior to this unacceptable reaction, and then correct for that reaction as the dog is thinking about it (before it actually reacts).
You need to work on your dog and teach the kids what behaviors are not allowed (for their own safety) around dogs and specifically this dog.
Higher rates of congenital deafness (deaf at birth) are observed in Border Collies with excessive white on the head, 2 blue eyes, or merle coloring than in the general population.