Try a probiotic called Saccharomyces boulardii. It's actually a yeast, not a bacterium. I've been using it for weeks now and it makes a massive difference in my GI stability. It is unbelievable. I didn't have IBD, but did have IBS/"leaky gut" type symptoms for decades, so bad at one point that I thought it might be Chron's... and this stuff changed all that literally overnight. I have to think that it could do the same thing for IBD sufferers.