Puppies play bite because this is how they would play with the other puppies in their litter. ‘Rough-housing’ is part of day to day activity between pups, and puppies actually have to learn the difference between how to play with them and how to play with you. Sadly as puppies get older, if they don’t learn this distinction, their play-style doesn’t change and their increased strength and adult teeth can make play dangerous.
Learning to regulate how hard teeth come down, and what is and is not ok to bite on, is called ‘bite inhibition’.
Although some owners may like to play rough with their dogs, it’s important to consider if the behaviours will still be ok when your dog is fully grown and has adult teeth. It’s also important to consider that your dog may interact with people who are not as capable of playing rough, such as children or the elderly. Making sure your dog is never in a position where they could accidentally injure someone is the best way to protect them and those around them.