I've been making water kefir for a few years, but didn't do dairy because I don't really like plain yogurt and I can't have the sugar of fruit additions.
But I just bought some and had it with my fermented blueberries, and did not have a sugar spike.
So I'm, going to the health food store tomorrow anyway and they carry that famous brand name Kefir grains product. But if there's anyone who can mail me a few of their grains I would appreciate it. I like to mix cultures up when I can.
I don't know if there's a DM function I don't see here, but I could post my email address so I could send mailing info.