Place a food item on the ground, you and as many people as are hungry gather around it and highlight the "Eat All" command. Everyone then clicks the "Eat All" command at the same time, everyone that did this will pick up the item and eat it. This works every time 100% of the time. You can feed your entire group off of a few cans of food or steak. Also works on drinks etc. as well. Have not tested on Canteen. Also this glitch does not work on guns with the "Take Into Hands" command so maybe make the food the same way. Maybe make choosing "Eat All" cause your character to "take it into hands" before eating?