Asher (my male GSD) just turned 2 years old in December and weighs about 68-70 lbs (around 31-32 kg). He is a bit on the thin side, but that's okay with me, I'd prefer him to be lean. It's better on their joints. Interestingly people always think he is huge. One person insisted that he must be part malamute because he is so big, despite the fact that he is actually an average size GSD and looks nothing like a malamute. I wouldn't worry about your boy if he seems otherwise healthy. I think the general rule is you should be able to see a tuck in your dog's sides when looking at him from above, and be able to see the last rib or two. I expect your boy may bulk up a bit in the next year or two. Unless he is a rack of ribs, I wouldn't try to fatten him up just to have a heavier dog. It's actually healthier, I think, for them to be a bit on the thinner side.
Last edited by sebrench; 02-10-2017 at 02:32 PM.