I can add a zero-sum veg feeding method. The less vegs there are the more nrg each veg gets.
I went to a lot of trouble to
stop it doing that a few versions back.
The idea is both unrealistic and actually causes a lot of problems.
The way it used to work you could actually get a negative food token given to the veggies if you got too many of them. The problem often used to show up when the bots were cultivating veggies (ie battery bots). First you get a point where there is no net growth then it goes negative and veggies start to pop out of existence for no reason.
It was damned annoying and I would really prefer not to go back there.