Reply To: Chalav Yisroel exceptions

Yes to all your questions. Some people make up their own rules (“I use CY milk but CY cottage cheese is too expensive”) and some people have a more defensible basis (there’s an idea that may or may not be correct that the milk of non-kosher animals simply can’t be made into whatever — butter, cheese, you name it). Regarding your side note, outside major frum population areas, CY products tend to be unavailable or have crazy prices.