We have a 16 year old long hair tortoise shell cat. About 3 months ago she started frequently urinating just outside the litter box. We took her to vet, she had a UTI, and we got antibiotics for her, she seemed to get better. But now she is constantly going to a specific area of a separate room in the house and pooping there, not near the litter box at all, and she is urinating in random places in the house. Suggestions? - tired of shampooing carpet!