The work suggests the sweeteners change the composition of normal, beneficial bacteria in the gut.
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You can work around the raw milk restrictions in your state by making other types of fermented milk products, such as yogurt or kefir. Kefir actually cultures better with pasteurized milk (not ultra pasteurized) and it produces quite a potent probiotic drink. I like it because you don’t have to boil and cool the milk prior to making it, as you must do to make yogurt.
http://www.culturesforhealth.com/
And you can also make lacto fermented pickles of all sorts, which also have similar cultures to raw milk.