846: Add a (Stale) tag to perishable foods that have gone stale. OR, add 'Perishable' tag to perishable foods in their mouseover tooltips.
Reasoning being that it would allow the player to directly tell whether a food is perishable or not without having to find a fresh or rotten version of the same item, having to interpret unhappiness and boredom maluses, or resort to the wiki.