Autumn likes rolling in the grass an it smells horrible. I can never see anything visible where she is rolling, not even some sort of weed, but I'm getting to suspect cat pee since the neighbor's unneutered cat is a wonderer. The other day a gave Sonny an olive (if cats like olives, Sonny hasn't heard), he left it on the floor and Autumn came and rolled in it. It's funny to watch but she knows I don't want her to roll in stinky stuff so she tries to do so when I'm not looking.