As long as A2M keeps selling and the share price keeps going up, who cares!!
Seriously, the beauty of the A2M business model is that its milk supplies are a mix of sources (nicely spreading risks while allowing local 'ownership' of the brand.) E.g. Fresh milk comes from the country it is operating in e.g. USA, Aust, UK etc however as I understand it Synlait is the supplier of A2's infant formula to Aust, Asia and China.