I have a lab and the vet once said she's in good shape because when you run your hand over her you can feel her ribs, obviously not protruding ribs but she should go in slightly at the waist (or what ever you call the stomach bit on a dog), and you should be able to feel the ribs, but I always think it looks too skinny and think I should feed her more....she's active and healthy but is always on the scrounge for food (which she would be like anyway even if she weighed 20 stone).
So just wondering what shape is the best shape, should she go in at the stomach or should she be a bit rounder? probably a strange question but I think I want to feed her up a bit but don't want to make her unhealthy.