Yes, I agree vet check first.
Have you changed litter brands? If yes go back to the old, If no, try changing, may be something they don't like. Look at the litter boxes too. Maybe a new one would help, different style maybe. And have at least two in different rooms.
If they're spayed and neutered, it's not marking. Womens feminine douche products will kill any cat odor, even intact male urine odor. Best thing I've found. Use it last after enzyme cleaners.
If no medical reason is found, you could try confining them to one room, feed at one end, potty at the other, until they regain proper potty habits. Put them in that room when you leave the house too... to be sure you break the habit of using the furniture. |