Urine marking in cats is predominantly a communication and stress behavior rather than a litter box problem, and welfare-focused approaches address the underlying emotional state rather than the symptom.
Urine marking is a welfare indicator as much as a management problem - it signals that a cat is experiencing anxiety, insecurity, or frustration. Punishing marking is ineffective and worsens welfare by adding fear to the existing stress. Addressing the root cause - reducing inter-cat conflict, providing adequate resources, and treating anxiety - is both more humane and more effective than surface-level deterrents.