7 month old gsd

Question
hi, my 7 month gsd , after todays visit to the vet, the vet was surprised that he weighs 35 kg, he is not fat in great shape, lovely physique and energy. but the question is . i know that the average weight for gsd male is between 35 and 40 kg, when does the height stop in growth of him , how big is my boy going to get??

Answer
I am afraid I don't have an authoritative answer on this.  We had a big discussion of this on a dog forum I am active on, and nobody had a source to cite, and nobody seemed to have the same personal experience.  I do have a reliable source for the advice to make an early switch to adult chow so as not to be feeding too rich of a diet for the 7 month growth spurt.  Adult chow will slow growth allowing more time to develop study joints for when it reaches its full adult size.  Usually it is more of a problem keeping a young Shepherd's ribs from showing, than keeping them from getting fat.  

My personal experience is that they level off at about 7 months, but continue slow growth until at least a year and maybe more.  One thing I think may be happening is that the larger members of a breed continue to grow more after 6 months.

There are some dog questions that do have hard and fast answers proven in rigorous controlled studies.  This is one that doesn't.