Fonterra Cooperative Group has kicked off a review of governance by posing the question of whether a board stacked with farmers has the right skills to drive a global business and whether milk suppliers in other countries should be able to hold shares. New Zealand's biggest exporter released a 13-page conversation starter ahead of farmer meetings this month, with the aim of having any changes to its structure put before shareholders for a vote in May. The review follows calls last year by shareholders and former directors Colin Armer and Greg Gent to shrink the board and increase its calibre following the departure of experienced independent Ralph Norris, former chief executive of Commonwealth Bank of Australia.