When dogs are 'playing' we need to watch their body language in order to truly see how a dog is feeling about that 'play' and to ensure that both dogs are enjoying the interaction. These are called meta-signals. They include play bows, bouncy movements, having relaxed, partly open mouths, curling and turning their bottoms into each other and lying down or stopping to pause play for brief moments. In appropriate dog play, you will see the following signs and signals: Relaxed and loose posture with bouncy movements, Play bows, Turning their bottoms into each other, Role reversal, Fair wrestling, Racing around, Mutual pausing in play, Self-handicapping, Inhibited biting and mouthing, Cocalising, Shake-off's. Remember dogs should not be allowed to just 'work it out between themselves'. As dog guardians, we must monitor their interactions and intervene if we feel it is necessary so that your dog and the those they are playing with stay safe and only learn appropriate play behaviour. It is worth mentioning however, that rough play doesn't necessarily mean that you have an aggressive dog but just bear in mind that the way they play, could result in an aggressive interaction. Therefore, always look for reciprocated, fair and even play and intervene if that play is appearing to be one-sided or where any party is looking more over aroused than the other.