Is Milk Kosher?

Some cows have certain defects in their organs that render their meat non-kosher, even if properly slaughtered. Moreover, the milk of such cows is non-kosher! Does a farmer need to do an MRI every time he milks a cow? Rabbi Avrohom Gordimer, an OU Kashruth Rabbinic Coordinator with special expertise in dairy products, discusses the reasons for milk's permissibility, despite the statistical probability of milk from defective cows being present. You won't want to miss this tour de force of halacha, biology, and contemporary news.