If you want a healthy snack for crows that they adore, my local murders (~100 crows) go absolutely nuts for cashews. We put them at the bottom of our peanut can, because as soon as we get the cashews out they will outright refuse peanuts and forego any sort of social etiquette and sometimes even try to steal from each other, so we only start feeding them cashews when most of the murder is sated.
I can relate