Thanks for the great info!
I learned about probiotics when Nemo was an infant, and was amazed to discover that they are safe even for infants! When he was a baby, I would either take an adult dose for him to recieve through my milk. During toddlerhood, I mixed half of an adult capsule into his food or a bit of juice. Once he started being safely able to chew, I started him on Rhino Chewable Acidophilus & FOS (a plant-based carbohydrate that encourages beneficial bacterial growth in the intestines), which he still loves and gets anytime he's on meds, travels, is sick, or exposed to someone sick. I love that they have 100% RDA of Vita C (for children) in them, too!
http://www.findsupplements.com/index...OD&ProdID=1416
Edited to update linkie.