My 10-11 month old female indoor cat has suddenly started peeing on my couch. We have used Urine-Off, she just moves over to the next cushion. Itook her to the vet, he said it isnt UTI it's with her de claw and they left a part of the nail and its bothering her. She still uses her box, has not done this until the last month, and only on one place. Any suggestions as to why and what to do?