The situation: I have a former stray cat whom I successfully trained to use a letterbox while she was quarantined in one room, but since she has had the run of the house, she has regressed. I thought at first she was just getting confused in the rest of the house, but it's been a month and it's a small house.
The setup: One litterbox upstairs in my study. This was set up during her quarantine and I was hoping to eventually be able to remove but now my other cat uses it as well. The other litterbox is an enclosed litterbox on the first floor. This is the "regular" litterbox that predates Stray Kitty. World's Best Cat Litter in both boxes.
What I have tried:
-Taking the hood off the enclosed litterbox. Stray Kitty still won't use it.
-Placing Stray Kitty in the litterbox after she eats and after she goes elsewhere. I think this helped with the initial litter training when she was quarantined.
-Confining her to the bathroom with the litterbox. Unfortunately, I discovered she can open the door.
-Spraying her favorite bathroom spots with felaway and/or Nature's Miracle No Spray DOES keep her from returning to them, but unfortunately it doesn't keep her from finding another non-litterbox "bathroom."
-Cat Attract. Seemed to help at first.