I've just installed a cat door in our basement, to let the cats get into a room that we've been using for storage. Ultimately, we intend to move the cats' litter boxes into that storage room, which is why we installed the cat door.

None of our cats have ever used a cat door before. What is the best way to teach them how to use it?

We want to ensure that they have no difficulty accessing the area where we'll be moving the litter to.