Aside: Yes, I know that m/d was recalled by Hills because the !#%*%*! Chicoms poisoned it. The tainted food has been removed from circulation, according to Hills.
The result of these experiments after a few weeks is that we both feel better and have more energy.
A few days ago I had a Diet Coke late in the afternoon at work because I thought I needed a jolt to get something done. When I came home, I found myself irritable and I snapped at the kids a couple of times, something I hadn't done since I had reduced my caffeine intake. Meanwhile, our Maximum Leader has renewed energy and her coat has improved dramatically.
All in all, we're both pleased with the results.