Mimi is 5 years old. Just had her annual exam last week and everything is fine. However, it’s been seen twice that Mimi, maybe intentionally, leave exactly one piece of poop somewhere in the room, outside the litter box. I checked her litter box and the rest of the poop was there and look very normal. She started doing this like last week before the vet check and the poop looks healthy. I have seen this twice already. Do you know what is causing this? Thank you.