All slaves, please make sure that during winter months when it is so cold, that you aren't just collecting dung and storing it. Dung has a habit of freezing, and then melting into shit soup. The freight wagon where the dung is stored, needs to be checked for shit soup sacks, and those removed, and more dung collected, and then dried properly rather than just frozen and stored.
There were four layers of dung sacks, that Ragnar had to go through in order to get proper dung sacks with dried dung.