Mice...

I fill the cars awith drier sheets a few times a year. I own two cats, both good mouser/chipmunk-er/squirrelers. I'm not using poison because of the cats and horses. It might be chipmunks. The cats kill tens of them a year, but I've never seen them up in the cars. Only mice in the cars and (my) mice love acorns... I find the remains everywhere with mouse droppings.