My baby is 13 months old,she passes pale yellow and foul smelled poop, is there any serious problem?

A. Loose motion are mostly infective which could be bacterial or viral in origin. the most important thing is fluid and electrolyte imbalance which can cause dehydration and further complications which should be managed properly. Initaially probiotics can be given along with zinc supplement and ors solution. Antibiotics should be given if required by the doctor only .