[Avodah] Are Cow & Donkey milk Min BeMino [never Battel]

[Micha Berger]

On Wed, Jan 31, 2018 at 12:25:26PM +1100, Rabbi Meir G. Rabi via Avodah wrote:
: However, when it is added to cows milk it is not discover-able. The Kashrus
: concern is that it might be in proportions greater than 60. However, ought
: it not be Min BeMino which is never Battel?

Why would the milk of two different minim be min bemino?

: Similarly, why is the milk [and the cheeses made from such milk] from a
: herd of cows that will undoubtedly have a couple of Tereifah cows Kosher -
: is it not Min BeMino?

The safeiq is on each cow -- this is rov in the sense of kol deparish,
before there is a taaroves.

Chozer veni'ur undoes bitul, when you add more of something that was
mevutal. I don't think there is an equivalent when you use rov to ignore
the possibility that any issur ever was added to begin with.

Tir'u baTov!
-Micha

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