I went to a dog park I know of, just to see what going on. Complete chaos!
Folks, let's be honest here, shall we?
If you're at the dog park with your pet, watch over him or her! Very important!
Dogs might be playing with each other, or it could be something different. Watch for signs of aggression- not all dogs like each other!
Also, speak with the owner of the dog in question if problems arise. Is it overly nasty? Hard to handle?
If that's the case, have your dog stay away from that canine! Keep close watch at times!
After all, it's your pet- defend if you can!