Yogurt has good bacteria (probiotics) but not in the numbers that may be needed for someone with IBD. You would have to eat gallons of it to equal the dosage of a good OTC probiotic. PB4 (a member of this forum) recommended Primadophilius Reuteri to me a few months ago (5 Billion CFU). I would recommend fiber supplements for regularity. Metamucil has eliminated my diarrhea.
Diagnosed UC 1999
Asacol (no effect)
Colazal (no effect)
VSL#3 (not enough difference to justify the cost)
OTC : Probiotics (Primadophillius Reuteri, 1 capsule per day), enteric coated Fish Oil (1.7g 3x per day), Metamucil (one serving 4x per day), Turmeric/Curcumin95% (1g 2x per day), Caltrate 600D (2x per day), L-Glutamine (9g 2x per day), LifeSource Multivitamin