wild boars in an enclosure in zoo

animal aper beast boar cage cattlebreeding chew corn creature domestic eats enclosure eurasian farm fauna feed food hog hogget hogling hungry life livestock mammal masticate munch muzzle natural nursery openair pasturage pedigree pet pig piglet pork scratch scrofa sloven snout sow stockraising sus swine swineherd wild wildlife zoo zoology boars