I had a similar experience with Merrick. I was feeding Eagle Pack Holistic selects and other than the fact that Kiri wasn't crazy about the food after a while, she was doing great on it. Then I changed to Merrick and her behaviour changed noticeably. She was more hyper and destructive and her tear stains worsened quite a bit. So I changed to Innova and it's amazing how she has changed. She is calm, she listens to me for the most part, her tear stains have lessened even more than when she was on Eagle Pack. But it's her behaviour that was the main difference. Even on Eagle Pack, which I liked feeding her, she had those hyper periods. But with Innova, she is active but never hyper. As good as Eagle Pack is, you may want to consider changing your dog's food (gradually of course).