I used to have the problem that my big boy Taz-man would not use the litterboxes, they are all over the house. I locked him in a cage until he would go but he wouldn't go in the box. I then found a box in walmart that works, I found out he was too big to fit properly in the box. He like to get all the way in the box to go. I bought these wallpaper trays in the paint section they look like the long 3ft patio flower boxes, but they are a thin white plastic ane he loves them. They all poop in the corner and the center is free of poop so they can get in and out w/o getting poop on them. Try this . It worked for my guys. Rocky [Posted in FML issue 2682]