You might want to take ebby to the vet to make sure it's not a urinary tract infection. That's usually the first sign that one is brewing.

I started out with just a regular litterbox with my first cat Mollie Rose. But she dug to China!!!! She got litter all over the friggin place. So I picked up a covered box and didn't have any problem introducing it to her.

Cats are very smart creatures. What I would do is keep both boxes side by side and let her choose. She might surprize you!

Good luck and keep us posted.