Hmmm, that's one I've never heard before. The exercise definitely makes a difference in how Kobie and Eli sleep (more physical activity = sleeping like logs). But if the idea behind varying feeding times is to keep dogs alert and therefore to wear them out mentally, it seems a lot more productive to substitute some TRAINING instead. Dogs love to learn, and teaching them new things--or working on perfecting old stuff--is a great way to activate their minds! I'd hate to have my dogs worrying all day about whether they'll get fed.