Yes it does kill good bacteria as well. I read an article on it once... (but not in the computer, had a paper on it but can't find it...)sparks879 said:i drink my milk raw, but i heat treat colostrum and pasturize milk for kids. I would prefere not to as long as my does test negative for CAE, but for show people want kids raised on CAE prevention. But i have aklways wondered, along with killing any bad bacteria in the milk what does pasturizing do to the good stuff as well? In my experience kids raised o raw milk grow better.