grazing — a touching or rubbing lightly in passing.
pasturing — Also called pastureland [pas-cher-land, pahs-] /ˈpæs tʃərˌlænd, ˈpɑs-/ (Show IPA). an area covered with grass or other plants used or suitable for the grazing of livestock; grassland.
noun nibbling
snacking — a small portion of food or drink or a light meal, especially one eaten between regular meals.
binging — a period or bout, usually brief, of excessive indulgence, as in eating, drinking alcoholic beverages, etc.; spree.