Real ****er wrote:

What eats the leaves of castor bean plants?

Seems to only happen at night. No bugs seen on the leaves
during the day.

I thought these plants were toxic.

Earwigs maybe?

probably slugs or snails

Do slugs or snails hide completely out of sight (and off any plants
they're eating) during the day?

How high up a stem or stalk with a slug or snail go to get to leaves to
eat them?