The problem started after tail amputation of a cow with tail necrosis.
This cow tried to remove flies and insects away from her body by throwing feed on her back.
Other cows in same barn developed this bad habit of throwing feed into barn although they had a normal functioned tails.
We had to sell the 1st cow but the problem stills till now and spreads to other cows in other barns by 6 % of herd.
We cannot afford to sell these cows because of their high yielding and pregnancy.
Please help me with that contagious bad habit.