What do bats all eat?

Mostly bugs flying in the air like mosquitoes, or some drink blood from horses and chickens.

~bats don't really eat. there's 2 main types of bats; the Vampire Bats and Fruit Bats. Vampire Bats mainly suck the blood of animals(mainly cows, horses, etc.) and Fruit Bats, well, eat fruit. That one kinda answered itself:) they do eat bugs though sometimes!