Beyond separating them,not much you can do to keep them from eating the other's food.
As far as kibbles, both those foods are about equal.
If you want something with higher protein instead of higher carb, which I think is more species appropriate - I'd go with feeding frozen raw or freeze dried raw like Primal or Natures Variety. Or for kibbles: Natures Logic, Natures Variety, Solid Gold, Wellness Core, Orijen/Acana...
__________________ ~ A friend told me I was delusional. I nearly fell off my unicorn. ~
°¨¨¨°ºOº°¨¨¨° Ann | Pfeiffer | Marcel Verdel Purcell | Wylie | Artie °¨¨¨°ºOº°¨¨¨° |