My 3 chickend knocked a weeks worth of food all over the floor last week. I swept it up and put it back in the hopper. It was 'dirty' ie had some bits of bedding and dry soil in with it. I didn't think they would bother as they eat other foods off the floor, but they didn't seem to eat much all week. One is ill (another story) so i decided to worm them and use fresh food, they ate loads when i put it out! I'm guessing flubenvet doesn't taste that good! So would you expect your chickens to eat 'dirty' food?