the cow in the pen is licking a white mineral salt to help add nutrients

agricultural agriculture animal animals availability baiting barn beef block blocks bone bovine breed brown calcium cattle clay cobalt countryside cow dairy deposit diet domestic eating elements environment essential farm farming field food grazing green ground growth harsh health herbivore herd husbandry iron land landscape lick livestock magnesium mammal mineral minerals molybdenum muscle naturally nature nutrients nutrition outdoor outdoors pasture phosphorus potassium ranch ranching ruminant rural salt salts salty selenium sodium spring stable summer supplement supplements taste trace ungulate white zinc