3 weeks
9 weeks
12 weeks
4 months
5 months
0
6 weeks
Deciduous teeth
Dentition
6 months
begin to erupt
fully erupted
Permanent teeth
begin to erupt
fully erupted
AGE
This timeline illustrates when the deciduous and permanent teeth erupt in cats and dogs. The deciduous teeth typically erupt around 21 days of age and are fully erupted by five or six weeks. The permanent teeth, then, erupt to replace the deciduous teeth around four months and are completely erupted by six months.