I've been feeding my dog NB DUCk and Pot since december now it has been fine until now he wont eat it until he get really hungry. I think he plain just doesnt like the taks of it. But before that he loved it. I know from eatring duck myself the flavor is really good. Lasr night he cried when I gave him his NB and he was staring at this bag of Iams on top of the friegerator. I fed him Iams, when he finished, he tried eating NB, but spit it out. I've noticed in the 6 -8 bags that I have purchased of the last 6 months the color/apperance of the kibble is different every time. I know they have made changes to the duck and potato content. Persoanlly I'm ready to try Eukanuba or Science Diet. These high end premium dog foods seem to cause nothing more than loose stool and sensitve stomach. He was on Nutro before NB and that did't work out. He's a high enerygy bully breed 80lbs and smarter than the average honor student, if anyone has any insight I would apprecate it..