Hopper Bone Meal Question

It usually comes out pretty good, I never had to use a vibrator on any load I hauled. You will need a washout no matter what you are hauling next. It is required by law that it has to be washed out if this is beef meat and bone meal. There will be paper work with the load when usually pick it up explaining about having to be washed out after uloading the meal. Sometimes you won't be able to haul certain loads until you haul 2 or 3 different loads. If you have ag hoppers I don't know how it comes out of the trailer, always had bigger doors. Hope this helps.