I've heard of people easily making home made Greek yogurt and kefir, and I was wondering whats the best way to start or a good source of the active cultures for both?
I do live in VA so I can't buy raw milk but I can get grass fed organic whole milk/half and half/cream. I can also buy fage full fat Greek yogurt.
So what has everyone tried and whats a good start? For any homemade fermented food actually, but Kefir is the one I am most interested in.