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 include: If either dog is running away or trying to escape or hide from the other dog, Continued or excessive yelping, Barking in the face of another dog, Escalating growling, Barring of teeth, Hard staring, Stiff bodies or tense body language, Pinning down, Continued mouthing, nipping, biting or holding, Standing or leaning over the head, neck and/or shoulders of the other dog, Standing up on hind legs for too long, When a cornered dog starts air snapping, When large dogs don't self handicap and play too rough with little dogs leaving them feeling overwhelmed or even cause injury, Escalated arousal levels, Body slamming, Continued or relentless chasing with no role reversal. 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. This is especially important with puppies as it's up to us to help them learn appropriate play behaviours and that means stepping in and stopping play if we see any of the inappropriate points above during puppy play interactions.