Can I switch between cow's and goat's milk?

I've never made kefir, but I hope to start soon. I was just wondering if I could go back and forth between cow's and goat's milk with the same grains.

I can't decide which one would be better for me. I have trouble digesting casein, so goat's milk would probably be easier for me to digest, right? (But then, if it's kefir, maybe it doesn't matter?) Also, I've heard that goat's milk is alkaline forming while cow's milk is acid forming. The only downside to goat's milk, that I know of, is that it is a lot lower in vitamin B12. I do not eat meat very often, so if I were only consuming goat's milk, I'd be worried about not getting enough B12.

Any thoughts? Tweet