LOL! I never thought of that (feed/pellets having something added that the chickens get addicted to). It would not surprise me, in the least! During the really cold spell, I often just put some dry pellets out in the pen for them instead of wet food because it was freezing immediately. Now that it is warmer, wet food is fed twice a day and I am back to fermenting it. They REALLY go nuts over it when it is fermented! They usually eat every bite (two cups of it for six chickens). When it is not fermented, they get bored with it rather quickly and go back to foraging. When I put out scratch or cracked corn, with some BOSS (threw in their pen to encourage them to scratch in the straw, because we had almost a foot of snow and they refused to go out in it---not much point in it when it is that deep, anyway). They really went after the sunflower seeds, picking them out. So maybe sunflower seeds are to chickens like chocolate chips are to us, if they were mixed in with soybean or wheatberry snacks, lol! I know ONE thing my girls are addicted to: dried meal worms! It's like crack to them!