Some common reasons why cats don’t use the litter box are: medical, anxiety, an aversion to the box, a preference for a particular surface not provided by the box, a preference for a location where there is no box or a combination of them. You’ll need to do some detective work to
determine the reason your cat is house soiling.
Sometimes, the reason the litter box problem initially started may not be the same reason it’s continuing.
Cats don’t stop using their litter boxes because they’re mad or upset and are trying to get revenge for something that “offended” or “angered” them. Because humans act for these reasons, it’s easy
for us to assume that our pets do as well. Animals don’t act out of spite or revenge so it won’t help to give your cat special privileges in the hope that she’ll start using the litter box again.