Awwww I love German Shepherds. Yeah, I have four other dogs too, different breeds, all rescued. (The boxer is the only one we got through a breeder). You can see their ribs when they are running/moving certain ways. The boxer breed, like the greyhound from what I understand, is supposed to have visible ribs all the time. It isn't sunken in or anything just permanently visible. I think that's one of the big reasons we kept getting targeted because the ribs are super visible while they are trying to grow into their legs.