Great idea!@CoriM I had the caking problem when I first used brewer's yeast. So I changed the way I add food and the yeast. I now add pellets at the bottom some mealworms on top [I should say a few mealworms but the girls love them so much, and I am a sucker for happy ducks, they get half a cup on top of their pellets] and I then sprinkle the brewer's yeast ontop of the meal worms. They are so eager to chomp down the mealworms, the yeast goes down with it and bingo! No caking!