You need to stop moving it back. When they get hungry enough they will eat from it. And you really only need one to be brave enough, the others will just wait until the bravest chicken steps on it.Again, trying setting 2. They are afraid and haven't eaten from it all day. How long should I let them be hungry, before I put it back to setting 1?
But again, you are just confusing things by going back a step. When they are hungry enough they will figure it out.