Eating it is better than starving, probably. ~TLD Dog Food Description
Hunger is one of the four major bars the player must keep track of. It is managed by the number of calories the player has, from 0-2500. The only way to treat hunger is to have the player eat or drink something with Calories. With the exception of Potable Water or Unsafe Water, all food, and some First Aid items, provide calories.
The hunger meter will steadily decrease as time passes until it reaches zero, at which point the player enters starvation and begins to lose Condition rapidly. Starvation is not an Affliction and does not require First Aid in order to treat, the player need only eat something.
The player can have a maximum of 2500 calories stored up, at which point the hunger meter is full. The player will be unable to eat anything while they are at full calories, and any meals will be left incomplete, with the remaining calories kept in the player's inventory. However, first aid items like Rose Hip Tea, Reishi Tea, Herbal Tea, as well as Coffee may be consumed, although they will provide no calorie benefit.
If the player engages in strenuous activity like chopping wood or sprinting, more calories will be burned than simply by walking, standing still, or sleeping. The player will be informed of how many calories, and how much time, an action will take.