We did a trial in December & January last year... so 2006-2007 for Matilda's behaviour. We didn't throw out all the cheese and yoghurt but just changed our drinking milk to A2. Unfortunately it didn't change anything for us, but DH & I liked the milk better & I didn't feel as sick after drinking a glass, which I couldn't do with normal cows milk.

Turns out though, Matilda is allergic to cows milk, not just the protein that is changed by having A2.