The kitty door we used to have, had a magnet to ensure the door closed tightly. Kuhio was kind of slow to learn it (and seemed to forget how to use it from time-to-time). Pepper figured it out in 2 seconds. Halo used it but didn't like it. Cammie never figured it out in 18 months. So, we took out the magnet and now that there isn't any resistance to it, Cammie flies through it.