I am fairly deep into my game and have had my wood production set up for some time already. I had bots set up to collect milk and then some to collect the dung. Now after completing my porridge system I check back over at wood area and it's grinded a to hault. Because my cows have stopped eat/moving. I'm aware they need to be milked but there is no ! Above their head. If I pick cows up and replace they will continue to work for a very short period then stop again. Any help?