Fonterra's woes are also worsening in Australia.
They have begun campaigning to ban plant based product makers from promoting ‘milk’ on their labels and in marketing.
Australian Dairy Farmers (ADF) claims the term gives a misleading impression that plant based products are nutritionally equivalent to dairy milk.
Australian dairy farmers have struggled with low production and a poor milk price for several years.
A 2017 survey by Dairy Australia showed 54% of respondents bought plant based milk alternatives because they perceived them to be healthier than cow milk.