When out ferreting on sat had a sort of strange day. the first 4 sets were all very clean with lots of digs around but did not produce any rabbits.Then the next 5 sets were all dirty and full of leaves however we bag 19 rabbits out of these and lost three were 3 bolted out of the same hole.So just wondering if any one has any clue why the rabbits are down the dirty sets witch we would walk past any other day.