Ah I asked AG the same thing when I wanted to change Fenn from the Prestige as she was getting a little porker . I was thinking of going for the adult or performance but when I spoke to the lady at AG and because Fenn was a picky eater prior to Prestige she felt that the Premium was the best choice as slightly lower in calories but still the intense flavor as you actually get chicken, as well as chicken meal in the Premium and Prestige where as the others you just get chicken meal (even though this is to a high standand). She said in her experience most dogs, especially the picky ones (like Fenn) will turn there noses up after having Prestige and can definitely taste the difference.
Not sure if that's helped?
