A '''shuttle programme''' is the alternative. This means that in a bird's growing period it experiences a number of different drugs in sequence. These programmes try to balance risk, productivity and cost. They are obviously very complex and only skilled specialists develop them for use on poultry farms. | A '''shuttle programme''' is the alternative. This means that in a bird's growing period it experiences a number of different drugs in sequence. These programmes try to balance risk, productivity and cost. They are obviously very complex and only skilled specialists develop them for use on poultry farms. |