My boyfriend and I have an 8 month old lab/spaniel/who-knows-what-else mix. We have a dog park at our apartment building. She generally plays very nicely with most of the dogs, but there are a few that she gets too rough with. She will usually grab the fur on the neck of the dog and hold on/tug on it. She's never shown any signs of aggression or broken skin on any dog, and actually the other dogs rarely make a peep, but I know that at least one of the other dog owners feels as though she's playing too rough. I will usually yell "NO, GENTLE" and try to catch her and pull her away. I make her sit for about 30 seconds as a "time out" and then let her play again. Within 5 minutes, she'll try to do this again. Like I said, she plays normal with most of the dogs and only gets too rough with maybe 2 certain ones, but even when they roll over in a submissive state she continues to tug on them. We can't correct the biting indoors, because she never plays this way with humans. Does anyone have any other suggestions? Will she grow out of this?