I had Angus tested last week at an allergy clinic and he tested positive to all cow's milk products except A2 milk. It's made from Jersey cow milk and has a different structure. Google A2milk. He is fine with goat and sheep products, so I'll be splurging on yummy goat's cheese and nice feta. This clinic treats the allergies from 6 months with something akin to accupressure. Angus' cousins have had amazing results and they had many more things they were orgianlly allergic/intolerant to. Google allergy elimination clinic. They might be able to put you on to someone in Perth if you're into that sort of thing. Good luck.