Hi everyone, brand new here. We adopted our new BUNNY Cookie about 2 months ago. She's been settling in just fine and didn't have any litterbox issues at all up until last week. She picks up her box and moves it out of the corner and then poops in the corner where the box was. I thought she was telling us it was dirty, but she's done it even with a brand new clean box. Any thoughts? I'm baffled.