This other dog has some issues. Its never a good thing when a dog snaps so unpredictably. I'm guessing it wasn't used to all the activity level. Poor Kaige. I hope it doesn't make much impact. You did good to not coddle him. Autumn took a few weeks after her attack to trust other dogs again. Often you find a few people at our dog park resocializing after an attack. We have so many visitors that even if 1% of dogs get attacked in a year its still about 10 dogs. They take a bit but usually take their cues from the owners about whether or not to be comfortable or scared.