There seems to be some disagreements among the healthcare community as well. With my son, we tried normal milk, goat’s milk, and raw. The raw was the only one that didn’t cause the gut issues. We mentioned this to his pediatrician, and he told us there was no difference. When we mentioned the variance to a different physician, he said there absolutely would be reason for him to react with the pasteurized but not the raw. I think he mentioned something about the breakdown of protiens when milk is pasteurized, but I can’t remember for sure.