Dex and I have been working really hard at improving his behavior around strangers. We live in a city, so it is pretty hard to avoid the constant flow of people around town. Just to recap from previous posts, I have had him since 4 months and we have heavily socialized him since. He was fantastic with strangers as a puppy, but now at 13 months he is beyond terrible with them. I no longer allow people to pet him when asked and his hair stands on end at approachers.
Oddly, he waits to see the stranger's motive before making a response. If the person just walks by, we can walk on and he settles down. If that person pays him any attention or speaks to me, he lunges and lets out a small growl! I have no clue why this behavior has turned for the worst. We carry a clicker and treats everywhere we go, and my strategy as of late has been to click and treat every time we walk by someone, as long as he looks up at me on the command "watch". I do this so that he can take his concentration off of the walking-byers and know that a reward comes when strangers are around.
Lastly, we have gotten both the CU book and the new CU Puppy Book, which are excellent. I am hopeful that some of those strategies might be of use, but I definitely fear for the stage we are currently at.