A Cat Mystery, with Bat Mystery Digression

We have an unsolved mystery on our hands involving our cat Leo, seen above playing with Ellen's nephew Zach last Wednesday night. Wednesday was rainy all day, so our visitors couldn't go to the beach. We played some games instead, and everyone also played with the cats and their many toys. We keep string-on-a-stick type toys up on the top of a tall cabinet where the cats can't get them on their own because Ellen always says that sort of toy should not be given to them unsupervised, as they...