Foot and mouth

Botswana is riddled with vet fences to contain the spread of foot and
mouth disease, which means that we frequently have to get out the shoe
box and wipe them across a damp mat while a guy sprays the tyres of
the car. All this to satisfy EU requirements for beef import. It also
stops the annual migration of zebra and wildebeest which has resulted
in killing off the large herds.