Cat Faux Pas
Some kitties just enjoy a smaller door. As you can see by this picture below, this cat decided to pass through the kitty door despite the actual backdoor being wide open. Perhaps it’s a force of habit? He likes doing things the hard way, apparently. Like those folks that “push” a “pull” door.

Full disclosure: we push pull doors on occasion, so no judgment here. This feline is set in his habits. Habitual till the very end. Nonetheless, his owners should continue to open the large door every time he goes out to see if he’ll continue to utilize the kitty door. It’s just a harmless experiment, no harm in that.