That makes sense. Thank you! I have been leaving it lately because I am dropping my daughter off at school at daylight. With the nights being so long, I hate for them to have to wait for me to get back to have anything to eat. I know it's not the best practice and actually agree with you completely, but I hate for them to have such a long night, especially the Bantams.Since birds, unlike humans, don't seem to get up in the middle of the night for a snack, leaving feed out overnight is generally disfavored - it attracts critters generally not beneficial.
and most of us who don't free feed try to adjust feedings each day so that a bare minimum (if any) is out overnight, or available for more than 24 hours - though in most climates, it should be "good" (not contaminated to any significant degree) for several days, at least.