I use preboiled chicken cabbage broth

I use preboiled chicken cabbage broth. It gives a more tart tasting final result after culturing with the probiotics, than I get as compared to using almond milk, so I think it is more successfully culturing the probiotics than almond milk does (probiotics make liquids taste tart when they have cultured).

I read once that probiotics need a range of amino acids available to survive, and I don't feel that almond milk has enough amino acids. Chicken broth does, and the cabbage puree in there provides a carbohydrate source for the probiotics to eat as well.

Homemade chicken broth, run through a sieve to remove bones, then pureed with cooked cabbage.

Sounds weird, but it works.