In the 1970s when the UK went into the EU New Zealand was largely reliant on butter and cheese exports to the UK.
The move really forced the New Zealand dairy industry to "pack their suitcases", get on the road and find new markets and they were very successful in that venture.
What's happening with the global supply and demand situation at the moment?
Gray says China and Latin America are buying dairy so there is a demand but overall it's still a slow recovery for dairy.
Gray also gives us an insight into all the European investments that Fonterra have tucked away for a rainy day.
Hear the full interview with Fonterra's Stu Gray in the Soundcloud embed below: