I drink raw goat milk and goat milk kefir. I had one day when I thought I had a bad reaction to it. I went off it for a while, but kefir is full of probiotics - even more than yogurt, so I resumed drinking it and do not seem to be having a bad reaction to it at all. It must have been something else. In fact, I seem to be doing very well most days and my symptoms are lessening gradually.