I think that would be a great study too. I really go back and forth...depending on what is most available to me and what I can afford...but I always try to mix it up with alternating feeds between mice, fish, and worms. Right now I would say that my snakes get worms more that anything...and then an equal alternation of pinks and fish. I might feed worms for three feedings and then feed pinkies and then fish and then worms again. I did two feedings in a row of pinkies recently because it was just easier to do with my time constraints. I think your diet sounds fine though.