Prancer is now 9 months old. I was shocked today when I weighed him . He is 30 lbs....I measured him at the shoulder he stands 17.5 inches. I feed him 2/3 cups twice a day of Fromm. I didn't think tht was to much ...maybe it is?..what is everyone's opinion ...is he chubby....I also feed him 2 tablespoons of natural peanut butter as a snack at noon ....do I need to change dog food? Feed less? I don't want him to get fat he is unalterated.