http://news.bbc.co.uk/1/hi/sci/tech/7150338.stm:

"Culling badgers in order to control bovine tuberculosis (bTB) can
cause a doubling in fox numbers, UK government scientists have found.
This could impact on livestock farming and conservation, the authors
write in Biology Letters journal. "

Hardly surprising - foxes too eat a lot of earthworms and small
mammals. They are in competition with badgers for a lot of the
food.

Now, there seems to be no reason why foxes cannot spread TB, so maybe
we should organise a regular cull of foxes, probably in the winter
when arable land is not in use. To avoid problems of global warming
we could ensure that the team only travelled on horseback, and to
avoid leaving deposits of lead in the environment we could use an
organised biological control instead of shooting them. And for safety
perhaps those leading this cull could wear brightly coloured
clothing. The police wear yellow reflective jackets, so some other
bright colour would seem sensible to avoid confusion.