After a full year of going to the dog park at a rate of once a week without any incident, I'm sad to say that he got into a fight yesterday. I'm not sure what kind of dog the other one was. It was larger, stocky, and more muscular. Maybe a boxer or a pitbull. No one was seriously hurt.
I didn't want that incident to discourage us from going back to the dog park, so I took him there again today. Big mistake! As soon as Loki entered, he was nervous about every single dog that sniffed him. And not five minutes passed before Loki started a big fight. It wasn't even with one dog in particular. He was just snapping at every dog around him; it didn't matter what dog it was. After making sure that no one was hurt, we promptly left.
I'm not sure if I handled it entirely correctly. I just leashed him and left. Yun thinks that I should have kept him on leash, but remained in the dog park. Or maybe I should have alpha rolled him there. I'm not sure what would have been the best way to handle it -- I never had to deal with it before. I was shocked, frustrated, and also saddened.
I felt like we spent so much time trying to properly socialize him so that he wouldn't be dog aggressive. Always going to the dog park every weekend. And now, what a setback! Sigh.