We have 2 ESS dogs, a 1.5yo female and a 1yo male. They're HIGHLY energetic. The female is dominant. She was here first, and her temperament is not as docile as his. He has always been a flop-on-his-back kind of playful guy when they're "playing." For the last 7 months or so, we've let them play together once in a while with supervision. The female bites his legs and his face, maybe all in good fun, maybe not. He doesn't yelp too often. When he does, we put them in their kennels. If we put them both outdoors and leash the female to a table, the male will stay near her to play wildly. Even when it looks like he might be getting hurt, he stays near enough to play. If we switch it around and tie up the male, the female plays with him until she's tired. Once in a while, they'll both lie down, completely tuckered out. Tonight, we had them indoors, female leashed to the couch. The male left her zone only once. He kept near enough to her to play hard for a long time. Argh! What can we do to help them get along better. I think if we just put them together unattended, they'd either get hurt or collapse from exhaustion. Thoughts?