Since she was old enough, I have trained my bun to use her litter box. She was doing amazing, barely any poops anywhere else and I could let her run around my room all day and she would never go potty outside of her box, but now she refuses to use it. I put droppings in there and have tried to make sure I move any stray poops to it to entice her but she refuses to use it. She doesn't seem to prefer one corner more than others, it is just EVERYWHERE! Any suggestions?