I have a Grey Hound and I have been feeding her the Sr. dog food, then I got a sample of the new Smart Blend dog food.She LOVES this new smart blend...My problen is now she acts like I never feed her. I have not change the way I feed her just the food. So now I am thinking I should maybe mix the Sr. with the Smart Blend. Anyone have a better idea or an idea why she acts like she never gets feed?