11.   The reduction is a sign the soaring cost of livestock feed made from corn is forcing feedlot operators to reduce their herds.

12.   This reduces the herd and has an inevitable impact on the ecosystem.

13.   The national parks department was trying to reduce herds to protect vegetation and landscapes in six nature reserves.

14.   The traditional method of reducing elephant herds was to kill them, a procedure known as culling that invariably drew emotional protests.