a herd of schoonebeker sheep with heather in background and a border collie dog on the brunssummerheide, the netherlands

herd flock schoonebeker sheep livestock heather brunssummerhiede netherlands dog collie animal group agriculture farm landscape nature countryside farming grass meadow mammal pasture grazing green many hill natural lamb rural scenic mountain wool view field summer herding graze concept ecology disease forest breed stock heerlen sheepdog domestic white lost sand