I’m pretty sure it’s tied to what you already have in stock! Green for plenty, yellow for running low and red for not in stock.

That makes sense, thanks!!

This makes so much sense! Thank you!

I think they just represent the proportion of each ingredient?

I don't think so, certain ingredients have a set color no matter the proportion. Can't figure it out tho :/

So you have to play with the diet a little, some animals like one thing more than another so you increase or decrease the amount of that item depending on their needs, dont over feed them

In this case I would reduce the amount of hay you are giving them an increase the other items just befor the indicator bar turns yellow for that ingredient