Hens and Roos
Herd Master
@norseofcourse if the book you have is by Ricki Carrol then I don't think there is any mention of the whey other than saying that it has to be whey from making hard cheese. For those that want the science behind cheese making the book Mastering Artisan Cheesemaking by Gianaclis Caldwell is the best.
I just checked that book out of the library and will be reading it