1.have the food item piece in your bags. e.g. rice, or canned food. move the food piece onto your hand. carrying it.
2.standing still on the ground, and eat it in your hands.
3.when your character starting eating animation, wait 1~3 seconds, then, use squat action, meanwhile, quickly cancel the eating food action. then you will get a hint, you eaten blah blah blah, and you get hungry level updated , BUT the food piece itself, not consumed!
this bug still there with ver.0.49.