Our 22 kg heavy Setter mixed breed girl gets per serving about 300-350 grams of food. Our dog is pure dry food over not devoted much. Normally. The Pro Plan Duo Délice you seem to have very good but tasted. She has cleaned the bowl empty at a time and also the feedings in the following days were enthusiastically received.
Whether it is because now that the food is as good or additives is particularly tasty, to be seen. I do not know, admittedly, from among the combinations of food and also do not know when a food can be described as good, "and when as inferior". It's important that my dog is going well and that he likes his food and she is tired. That was all the case here. So it is a very good food, what I my dog for me - will treat again - but in spite of the relatively high price. Perhaps not entirely, but every now and then. It also remains to be seen whether their enthusiasm would not but subside with time. I think you should make the diet even in dogs halfway varied, so it does not become boring, is for me to even fresh vegetables etc.