Iams and Eukanuba are HORRIBLE food. They do have a very good marketing department though. Go to your local pet store, NOT pet store chain. Look for foods like Innova, California Natural, Precise, Verus, etc. This is a subject I know a lot about.
I'd be curious about your research program. I've been feed large numbers of cats and dogs ordinary Purina dog and cat chow for fifty years and never seen any health problems. I have switched to lamb and rice for the dogs.