[jmdt]

I found this I think it kind of explains it. I am no expert but it also really depends on the dam and sire of each puppy.


Height increase versus weight gain:

There comes a point of a pup's life at which growth plates of the long bones becomes fused and length no longer increases. In humans, growth plate closure of long bones occurs between 17-21 years of age though muscle continues to increase until full physical maturity at around 25 years of age. An equivalent thing happens in dogs. Though growth plates close between 8 - 11 months of age, body weight continues to increase until full adult maturity is reached maybe months later in larger breeds. A simple estimation for predicting adult height is that a pup will be 75% of its adult height at around 6 months of age.