I really found this discussion fascinating for two reasons.....I experiment with just about anything edible, and the mini-thread on lactose intolerance. My own experience....I grew up on a dairy farm, drinking milk straight from the tank. it was not until I moved away from home to the big city that I developed intolerance. It peaked when I was about 28. Now, I just get very gassy (sorry for the tmi, but i thought it might be relevant). I have a younger brother who couldn't even handle goat's milk as a baby. he has no problems now, except similar to mine.....
So, thanks for the great read, I really hope you suceed with your cheese, and Cath, I hope your son gets better and maybe this will give you a little light!