Just to let you know when I first started BIO-K I had a few problems. Mostly just a rumbling strange feeling in my stomach. It went away after about 8 days, definetly by day 12 it was gone. I think I started at too high of a dose (started at 1/4 bottle, went up to 1/2 too fast). They suggest for IBS to start with 1 tsp and work up by 1tsp at a time.
Just a thought if it was giving you gas when you first started out, it may just be your system getting adjusted to the new probiotic. I wouldn't suggest taking the dairy one.
And yeah it's sour, but I take it after my oatmeal and have gotten used to it.