Baxter has his own food box, just like the other two cats in our household. Baxter has observed Brodie exiting his own food box and has discovered an opportunity to enter the box at a special time when the kitty door is still open as Brodie passes through it. Baxter simply enters the kitty door before it closes behind Brodie, thereby "hacking" his way into the "forbidden zone" of Brodie's food box.
"Smart" is a relative term, however. Despite the fact that Baxter is determined to, and successful at getting into Brodie's food box, it just so happens that, in this case, the food in Brodie's box is exactly the same as the food in Baxter's box. Baxter thinks the food in Brodie's box is somehow better than his own food. The only difference is the location, and the fact that the food in Brodie's box is Brodie's food, and not Baxter's food. In our household, Baxter thinks he "owns" everything so this is his way of trying to convince us that he now owns Brodie's food.
Individualized feeding stations works very well 99% of the time. Once in a while we have a "glitch" like this one. Still it is a great way to isolate diets of cats in multiple-cat households.