It can be a bit of a problem if you're new to the game. Reminder though that you should be getting +42 fullness/food whenever you rest at an Inn for 10 gold.
You can drink from the Elf Pond so that every visit after will provide food.
"Harpies Flocking" will lead to stealing Eggs for food.
"Ettin Sleeping" encounters will also lead to large amounts of food.
There's ways to keep yourself full.
You could also look into editing the Json files and give yourself 1m food.