Try to find discussion groups for a book called Nourishing Traditions. Many of them are really into making kefir and can answer any questions you might have. They're also really into "healing the gut" and getting digestion healed, so they can have other advice too.

Places I would look:

http://www.westonaprice.org
http://www.mothering.com/discussion...splay.php?f=365
the paleo forum on this board

I would be concerned about the carbs in kefir too. If you buy kefir starter grains or powder and make your own kefir, you can make it in things that aren't milk, such as coconut milk or diluted juice. Maybe they would have fewer carbs?

HTH!