Your English Setter may not require the same amount of volume in food as others do. A lot can depend on how often and much your Setter eats. For instance, their age, their activity rate and metabolism all play into consideration.
With that in mind, it appears most English Setter owners recommend around 2 to 3 cups of high quality dry kibble daily. Meat should be the first ingredient, and your dog should replenish around 1200 to 1300 calories per day. If you have a working dog, of course, it’ll be more caloric intake. You should feed your dog top quality dog food, with labels of medium to large breed food.
As always, you should provide your English Setter with fresh drinking water, the most essential ingredient.