My cat is so big, he won't use the litter box that I have for him and his mom, so he goes on a rug I have out just for him. I wash it all the time with the garden hose and spray it down to get rid of the odor. He tops 20 pounds now and doesn't fit the door of the big box I got. And the dog goes all the time. I used to let them out on leashes, but can't here at this complex. Cats you can't walk and it is a pain, but dog goes out several times a day. Accidents happen and we have to take care of them.