Do the cats eat in the middle of the night?
More like an hour or two pre-dawn instead of the middle of the might. Although ambient light in urban areas may move the hunting drive earlier.
Sometimes, Bandit the racoon comes at night before George Jones shows up.
I had two stray cats showing up, Goldie and Dean. Which is how I started putting food outside. Goldie moved in and usually spends most of the night inside. Dean comes by sometimes.