My dogs LOVE bone broth. They lap it up first, in preference to any meat on the dish.
I've been growing my own SCOBY from the dregs of two bottles of raw kombucha. (I got the instructions from culturesforhealth DOT com.) It seems to be working fine. After a week, it is a little over 1/8" thick. I'm looking forward to trying it out in a week or two. I'm getting quite the kombucha habit, so the cost savings will be appreciable!
Luckily, I'm not much of a drinker, so kombucha as a mixer doesn't tempt me. Although, I would imagine it looks pretty cute with an umbrella.