I see far too many GSD owners that do not understand how to properly gauge the right weight for their dog.
In the same vein, I also see many dog owners who stick their fingers in their ears and start shouting "LA LA LA MY DOG ISN'T OBESE LA LA LA"
When the reality is they have a barrel with legs. I've seen pictures of dogs with literal fat rolls and comments from owners saying things like "He doesn't look obese to me" or "He's got a waist!" - all while their poor dog suffers, sometimes for years.