Sure, the milk is nutritious but there's not enough from a rabbit to be worth bothering with for a human. And milking rabbits would not be like milking cows. Cows, and even many goat and sheep, stand relatively still to be milked. Rabbits can't and won't and there's no good way to make them.
The theory that wine was discovered by accident is most likely correct because wine grapes contain all the necessary ingredients for wine, including pulp, juice, and seeds that possess all the acids, sugars, tannins, minerals, and vitamins that are found in wine.
How To Use A Refractometer in Winemaking. It's important for winemakers to know how to use a refractometer, because it is used to measure the amount of sugar (actually, the percentage Brix) in the juice of grapes or other fresh fruit. Winemakers know there is a direct correlation between the amount of sugar present and the ability to make wine.