my cousin recently brought her dog to come socialize with my lab and they seemed ok at first.. but then gumby (my lab) his fur on his back went really high up and they were barking and yelping and biting each other very loudly.. my parents keep telling me that they are still playing but it really seems like they are fighting too me. Does anyone know when playing and wrestling turns into fighting. and yea my dog crunches up his nose and you can see all his sharp little teeth