[Avodah] Psak about Muscovy Duck from the Rabbinical Institute for Kosher Supervision and Research

[Ben Waxman]

I never heard the story but from the quote you gave all the CS is saying is 
that my community uses such a mikveh, this is a community of Torah learners, 
and since this is our minhag, it must be kosher. But not that "I am a 
tzaddik (or my father was a tzaddik) and therefore the mikvah must be 
kosher.

I have no doubt that the Beit Yosef would indeed say that the Rema ate treif 
if the Rema ate non-glatt meat.

Ben