Thank you for that article. It does explain quite a bit and calls my attention to a few mistakes I have been making. Most often the trigger for AJ is a "big gallumphing idiot" and yes, Labs have been the most frequent problem. It has been when another dog rushes in at him with no sense of personal space, and yes, the owner is usually of the opinion it is my dog who is being rude. I will have to be more vigilant in watching how he is being approached and what he is telling them.
I got a little giggle out of the Mr. Rude story, the Lab who marked everything he had time to lift his leg on. I have a friend with a Boxer-Spaniel (?) mix who has not been neutered and not socialized with dogs at all who does this. The owner let his dog off lead while I was walking AJ. Well, here comes Gallumphing Idiot. He was bitten on his ear for his trouble. I tried to explain to the owner, who is my friend, how obviously rude his dog was, but his response was similar to that of the title of the article. He said, "All he ever wants to do is play." So his dog rushes AJ, stops every 15 feet to pee on something, and even body slams people. But that is a blatant case of rudeness and I am able to respond appropriately by removing AJ from the situation.
Last night, I missed the rudeness of the Basset and inadvertently placed AJ in a box. He was between two trucks and I was behind him. He didn't have anywhere to go. That was my fault. When the Basset approached, she had her head low and tail wagging, but she approached at a half run and came right up to AJ, stuck her nose in his face and he latched right onto it. Again, my fault for first giving him nowhere to go and second for missing the behavior of the Basset. Thank you for helping open my eyes.
BTW: It must be instinct or something, but I did not yell or punish AJ for what happened. I put on a show to calm the other dog owner, but AJ knows when I'm serious about something and ignored me. I walked him away from the Basset, he did his business and he still got the Really Good Bone when we came back to the truck.
I would look into a behaviorist if I was going to be in the same place for more than one or two days at a time and know where I'd be in three weeks. My job prevents this, but thank you for the advice. I will pay closer attention.