I always get "that is a big dog" with Sin because he's 28-28.5 inches at the shoulders, I never get any "fat dog" comments but I haven't heard any "he's too skinny" comments lately. His hair is really long on his stomach and it makes him look more filled out than he really is.
I hear "he's too skinny", "do you ever feed him" and "he really needs to gain a couple" about my Dalmatian. He is skinny, you can easily see his ribs and you can see his hip bones but he is solid and muscular, he eats 1.5-2 cups more than the dog food recommends but he has a lot of energy and runs a lot.
Sinister ~ black male GSD 3.11.09
Draven ~ male Dalmatian 6.30.13