Puppies begin teething at around 3 weeks, and by approximately 6 weeks all of their deciduous teeth will have erupted. The incisors (at the front of the mouth) and the canine teeth (the fangs) erupt first, followed by the premolars. Dogs do not have any baby molars. At around 12 weeks, the deciduous teeth begin to fall out, and the permanent teeth begin to erupt. Normally by 6 months of age, all permanent teeth have erupted, and all deciduous teeth have fallen out.
We recommend that all the biting energy be directed to various chew toys. You are advised to always supervise your pup with chews to avoid any untoward incidents.