Thanks for the scientific analysis. It's always easier for me to have facts for a base to assimilate it better, but that's just me. Right now my hens are eating ground orange peels when they won't touch them in the summer....Do they, indeed, know what nutrients they need or is it just they are bored and the orange peel is different? I know with my goats, they will not eat citrus some days and then other days, they gobble it. I was told they know what they need (not want) and eat with that in mind. Chickens as well???