Having had PLENTY of experience with Emily and litter box problems the first thing is to have Bouncer checked out for a UTI. I hae also steam cleaned the carpet areas (with pre-treating for animal stains). If possible keep the area off limits for a period of time and that will help to re-train Bouncer. I also put an area rug over the Emily's "favorite" area after everything else and she finally seems to be okay with things (as long as I scoop the box at least once a day).

Good luck and hopefully it is just a UTI that can be treated with some anti-biotics.