I like the idea of this mod very much!
Would it be possible to have this one effect the productivity for cows (instead of a money payback).
I have a placeable heating plant by my cow facility and it would be cool if I also needed wood chips to have 100% productivity for the cows.
Then, if it runs empty on chips I would loose 20% productivity.
This would give me a reason (force me) to include forestry in my farm (or using the "crop" poplars for chip production).
