Dogs generally stop teething by around 6 to 7 months of age. Puppies start losing their baby teeth and their adult teeth begin to erupt typically between 3 to 4 months old, and this process continues until about 6 months, when they usually have all of their 42 adult teeth. The teething period can last roughly 4 to 5 months, but in some cases, it may extend up to 8 months or even a year in rare situations. Puppies show common signs of teething such as increased chewing, drooling, and sometimes mild gum discomfort during this time. By 6 to 7 months, the teething process should be complete, although chewing behaviors may continue out of habit.