In around 4 to 7 months
Dogs have two permanent molars on each side of the top jaw (maxilla) and three permanent molars on each side of the lower jaw (mandible) (mandible). All molars will have erupted by 4-7 months of age.
The first teeth to fall out are the incisors (the tiny little teeth at the front of the mouth). Around the age of 4-6 months, puppies lose their canine teeth (those sharp, small fang teeth).
Puppies are the latest to lose their teeth, typically between the ages of 5-7 months.