My pup is almost 6 months old. He's very well socialized and loves people and other dogs. I take him to the dog park almost daily. He loves to play chase with other dogs and whenever he is doing the chasing, he barks non-stop. Also when two dogs are play wrestling, he gets in their face and starts barking constantly. He's not aggressive towards them at all, but it gets pretty annoying after a while; he's the loudest dog at the park. I've tried the time-out thing when I can grab him, which doesn't seem to help. Also I'm not sure he knows why he's getting a time-out. Any advice to quell this behavior would be appreciated!