Inevitably, the only option left was to hunt, but this was a formidable task. The monster infested areas were limited. It was unreasonable to provide food for the many number of personnel in the expedition through hunting. It could only be attributed to them overlooking the importance of food.
As the food ingredients rapidly decreased, the morale of expedition fell as well. Food quality declined and the situation of saving food to eat later came up. Not only did the quality of food drop, they had to save as much food possible.