We have a large population of eagles, fox and coyotes so our chickens cannot free range. Does throwing the sprouts into a chicken run end up making a big mess in the run? It looks from the photos like a lot of roots are left over and they tear everything up when eating the sprouts.
@holm25 is right. I just pull the fodder, roots and all, and set it down into the run. I do this when the wheat grass is no more than 4-5" high (I always worry about their crop digestion and things getting tangled, lol). Within a few days, there is nothing left.
Let us know how this works!