Bags

Every mouse carries two empty bags. Every treat takes up one empty bag, so the most treats a player can forage are two. When full, the treats have to be brought back to the mouse burrow to be unloaded. Then the player can venture out again to the surrounding countryside to forage more, but be careful, if both of your bags are full and you encounter a predator without having the right form of protection against it, then you lose the contains of your bags in order to make your escape. Other players might be able to steal your lost treats after the area is save again, if they are quicker than you or have a raven at their disposal.