Well, I believe it is best for dogs to be fed a variety of foods, different proteins, different carbs, so I would switch foods just for that reason alone. I wouldn’t expect the lack of weight loss to be because of chicken versus some other protein source, but it could have to do with the amount of carbs or fat.
The DFA method takes out the water that is still in the kibble, so you can better compare kibbles. Some have more moisture than others. The DFA method also assumes a certain level of ash.
For my dogs, I prefer to go high protein, moderate fat, and low carb and just adjust the amount I feed, but I don’t have dogs that would drive me crazy with begging and acting pitiful either, if I don’t feed them a certain amount of food.
