I like purina green bag or I should say my dogs do. I give the short haired pointer 2 cups and my border collie mix 1 cup a day along with whatever we have for dinner. Never have a problem. I have done this for years and always get about 15 yrs out of my mutts . Never any health problems either so my opinion is if it works good don't mess with it. besides they love a plater of whatever we have including the salad and veggies . Even buy them a DQ doggie sunday when we stop for 1 . Don't do it often but hey they like it on a hot day also.