It should be noted that while many usual LGD breeds do have a high defense drive, they also can and do (and in my opinion should) have some prey drive. It's simply overshadowed by their bonding and protectiveness of the flock. I do agree with Shred in saying that, providing the type and the history in the lines, it very well could be POSSIBLE to get an AB to be an LGD. The PROBABILITY of making him an effective and *trustworthy* LGD is the question.