Are You Looking for a Great Puppy School in Waverley Area? Eazy Dog Training runs puppy school in Waverley area, Marrickville, Newtown and Leichhardt. Puppy biting surely can be annoying... But why do puppies mouth and bite? Puppies use their mouth like we use our hands. They like to explore the world with their mouths, which makes everything (including your hands and other body parts) a potential chew toy.