Hi. My friends cat has been living outside for a couple of weeks and it is pooping on my grass. He does not bury his poop so when I go outside I see it. The cat has been living inside for 5 years with. Another cat.this cat was pooping and peeing all over the house that's when she decided to make it an outside cat. I love cats. I have 2 and they mean the world to me. Could there be a medical problem. What can do so the cat maybe can poo somewhere else. Please help. It is driving me crazy. My friend wants to put a litter box out. Would that help. But he stopped using the litter box inside.