How long does it take a golden retriever become full grown?

Golden Retrievers typically reach full maturity around 2-3 years old. However, they may continue to fill out and develop their adult coat until they are around 3-4 years old.

Here's a breakdown of their growth stages:

* Puppies: Grow rapidly in the first year.

* Juvenile: Slow down their growth rate and start to look more like adults.

* Adult: Reach their full height and weight.

Keep in mind that these are just general guidelines. Individual dogs may mature at slightly different rates, depending on their genetics and diet.