Livestock powered millstone for grinding grains

[Ezhe]

I was wondering what if there is millstone in Unreal World, which can be powered by people or livestock, like bull or reindeer. Grains can be processed into flour automatically in the millstone when there is a proper animal attached to it, just like how it's attached to a tree or fence. Player can build a millstone himself or use one in a village, perhaps.
With millstone introduced to the game, cereal dieted style could be a considerable choice compared to dried/smoked meat dieted style. Because the millstone saves a lot of time and effort from processing grain. You don't have to grind grain yourself, just need to leave the work to livestock and do other things at the same time.

[Bert Preast]

There is a quern stone you can craft in the BAC mod, which makes grinding rye and barley flour much faster. 

To make a livestock-powered mill would be quite a lot of work; and I suspect that the moment you left it to do something else, the livestock would also leave it to do something else 

[Tinker]

... or eat the grain/