Hello Rabbi,

I’ve been reviewing Mishne Tora Hilkhot Ma’akhalot Asurot and have a question about the following halakha (3:8):

ח  בהמה טהורה שנטרפה, חלבה אסור כחלב בהמה טמאה; וכן ביצת עוף שנטרף, כביצת עוף טמא.  נתנבל העוף–אם נמצאת בו ביצה גמורה כנמכרת בשוק, הרי זו מותרת.

If I understand correctly, halav from an animal which has become terefa is asur.

Today, it is very common for milk cows to routinely undergo abdominal surgery to correct a displaced abomasum (4th stomach). Today this is obviously done to keep the cow healthy, my presumption is that before modern medicine this would be an injury and cause the cow to die (or at least become terefa) because of the incision.

Therefore, is there a concern with halav goyim that perhaps the milk was derived from a terefa?

On a more philosophical note, if the reason for a prohibition no longer applies does the prohibition no longer apply (except for taqanot/gezerot)? In this case, with modern medicine, this is done to make the cow healthy, so does this prohibition still apply?

Thank You,

-Elad