Yitayningwut; even if we pasken from the Gemarra when the S’A’ does not say anything about a certain thing, in the case of Cholov Yisroeal vs C’S’ it certainly has what to say so at least in that case it would seem to me that we would go by the S’A’ and not directly from the Gemarra.
What exactly is a Baal Nefesh?