Puppies do regular biting, play biting, mouthing, and nipping behaviour because they discover their ecosystem and discover how to interact with other puppies and people. will you be informed about chasing behaviour? https://www.google.com/maps/d/u/0/edit?mid=1Loaxd9o4I0MvP5CHmLZ6bvGvzslqEQw&usp=sharing