Hi Nadine-
Farmina looks like a fairly good company. I see they are dedicated to research and have a staff of qualified people formulating their diets. Especially if it agrees with your pup, I would continue to use it. They do also make a chicken and pomegranite in a large breed puppy formula, that might be more appropriate for him than the adult one.
As far as the feeding guidelines go, it looks to be an extremely high calorie food. This is likely the reason for the low seeming feeding guidelines. If you do decide to up his food intake make sure to check that hes not gaining a lot of weight. It is best to use a low energy density food for large breed puppies to help with weight gain, but if you have done fine thus far in keeping him lean I’m sure he will be ok.
Purina Pro Plan is what I use for all my pets and they do best on it. There is no ingredient in Pro Plan that concerns me in the slightest. The reason the feeding guidelines are so different is because of the kcals/cup. If you fed him the Pro Plan Sport 30/20 which is 475 kcals/cup he would eat about 4cups a day if fed as an “inactive” dog. It would be a little higher if fed as a “typically” active dog.
