So, i have a 3-year-old female cat and a one-year-old 'kitten' of her's. The 3-year-old has NEVER had litterbox issues. However, she does occaisionally use the bathtub (usually when I'm using the bathroom and she follows me in, she'll just go while I'm going - never got it, but it was easy to clean, so I never really thought anything of it). Now, the real problem is with the one-year-old: we've tried everything I can think of and nothing has worked permanently - she pees outside the litterbox! I've taken her to the vet and she's spayed, but not declawed. They don't appear to have any dominance issues severe enough for me to notice (they hang out together all the time; yes, they play rough sometimes, but they seek each others' company for snuggling and cleaning all the time). We have two spacious litterboxes. When we got the second one, we kept the 3-year-old out of it (thinking it was the smell of her urine in the box that was keeping the one-year-old from going there) until the one-year-old had time to mark it as her own. At first, she was peeing on the carpet in the dining room (completely unappetizing), so we thoroughly cleaned the area and put her litterbox there. So, she peed right beside the new litterbox instead of in it. Now, she'll use the litterbox sometimes (I've seen her do it!), but not always. She's urinating on the sofa (which is just over a year old!), and on a covered bench in our study. I had the vet check for urinary/health problems and she found none. She only pees on the furniture when no one else is around, so we never have the chance to correct the behavior when it's happening. I've DEEP cleaned the sofa and bench (like, taken covers off pillows and washed EVERYTHING with enzymatic cleanser), but it doesn't seem to make a difference. She's a perfectly healthy, normal one-year-old cat otherwise, I just don't know what else to do to correct this! Please help us!