Why do cats stop pooping in their literbox?

Cats may stop using their litter box for several reasons, including medical issues like urinary tract infections or gastrointestinal problems, which can cause discomfort. Stress or changes in their environment, such as moving homes or the introduction of new pets, can also lead to this behavior. Additionally, the cleanliness of the litter box, the type of litter used, or even the box's location may deter them. It's essential to observe any changes in behavior and consult a veterinarian if the issue persists.