Litter box inadequacy is a leading cause of house soiling in companion cats and often reflects genuine welfare deficits including pain, stress, and territorial conflict in multi-cat households.
Litter box problems in companion cats are frequently welfare signals rather than behavioral choices. A cat eliminating outside the box is typically communicating something: pain during urination, territorial conflict preventing safe access to the box, an aversive litter texture, or a box that has become too dirty to use comfortably. Treating house soiling as a behavioral problem to be corrected rather than a welfare indicator to be investigated delays appropriate response to underlying suffering. Medical causes including urinary tract infections, bladder stones, and arthritis should be ruled out before assuming behavioral causes. Adequate litter box provision prevents most litter-related welfare problems.