I thought they would go with the weird looking yellowish bits first but they didn't seem to differentiate.  Though the first ingredient is chicken.. there's also brewers rice and wheat and corn gluten meal..so we never get away from that corn do we?  Seriously, there are all kind of things in this food that are good for your dog.  I have 8, so I pay attention to cost and the ingredients.  In cheap foods I have found that most of what goes in all comes out, with purina pro there seems to be less "waste"..meaning my dogs are utilizing more of the food.  There is one thing that I wish I knew was.  It's called animal digest..listed as ingredient..guess I'll have to ask purina that one!!