Navarro just turned 16 weeks and we started going to the dog park, since I don't know many people with dogs and he seemed quite timid of them. He's only come out of his shell once when there was another puppy at the park, but other than that usually just sits under the bench and watches. Today though there were people sitting about 10 feet away from us and he started to have fun running between me and them. Out of nowhere this dog ran over, no warning no smelling no nothing and attacked him...pretty sure he wanted to kill him. Navarro started wailing while this thing was over top of him biting at his neck. The people I was sitting near pulled him off, and Navarro ran under the bench crying. The owner of the dog took him over to the other side of the park. Navarro jumped on the bench and hid behind me as I was trying to calm him down, but about 2 minutes later the dog ran back across the park, leaped on the bench and latched on to Navarro's neck again. They both fell to the ground, the dog was pulled off and owner told to leave. She told us it was because we were sitting near the water (50 ft away). Thankfully there were enough people there to encourage him to get off the bench after about 10 minutes and walk a lap of the park before we left. Got home. Had a good cry. Now I have NO idea what to do. We're both traumatized and I don't know if or when we should go back to the park. I don't know why that dog went out of his way to attack Navarro. I can't find any cuts on him, but he has a broken puppy tooth and the girl that pull the dog off had her arm bitten. I feel so awful for putting him in that situation. This is the most awful day.