Sherri, if you child is on anti-biotics, kefir is great, but go buy a pro-biotic as well... you can get some kind of pro-biotic at any healthfood store. The biggest problem with taking anti-biotics is that they knock out all the good GI flora, and there is nothing to keep yeast overgrowth from occuring. Drinking kefir is good but does not deliver near the amount of flora that the GI needs in an "anti-biotic" situation... anti-biotics are un-natural, and it would be otherwise almost impossible to loose all your GI flora in a few days! Beeyoutiful.com's Tummy Tuneup8 is really good for this type of situation, but you should try to get something today if you can.
--gabe (...on Beka's computer...)