Here's a breakdown:
* Small breeds: Typically reach adulthood around 1 year old.
* Medium breeds: Usually reach adulthood around 1.5 years old.
* Large breeds: Can take up to 2 years to reach full maturity.
Keep in mind that these are just general guidelines. Some individual dogs may mature faster or slower than others, and factors like nutrition and environment can influence this process.
It's always a good idea to consult your veterinarian for specific advice on your dog's development.