If you have concerns just say so, also keep in mind too that some dogs have a very high energy level and can appear as if they are not getting enough nutrition when they are. Its just that they burn more energy than another dog that just lays around the house and don't get the same amount of exercise. (mine for instance) They are on a three meal a day diet but because they are very lazy and a bit over weight. A Poodle who is typical a very high strung dog would probably get lot of exercise burning off the pounds.
Here is a weigh chart for dogs to give you an idea of the proper body type for a canine.
Consultation on the Draft Dog Welfare Code of Practice: A Consultation Document issued by the Rural Directorate of the Scottish Government Las Vegas Pet Weight Loss