Good pastures have certain elements and qualities that make them critical for grazing animals' welfare. Good water supplies, clean and free of pollutants from any industrial site, grasses and vegetation free of noxious weeds, fences that keep the animals contained and safe from any nearby roads and traffic, limited rocks and stones and clean from any metallic refuse and trash. Barbed wire is no longer considered a serious option by ranchers or farmers because the veterinary problems exceed the cost of the wire.
Wild animals, mostly mammals, live in open pastures as well. These animals seek the vegetation and open space that provides an element of safety for the herd. Herd leaders, the "alpha", can see any predators long before they become an danger and escape is easier. Open, grassy spaces still exist in the Western States and you can still see grazing herds of antelopes and elk.
Even-toed ungulates
Grant's gazelle
Greater kudu
Blackbuck
Bates' pygmy antelope
Jentink's duiker
Gacela de przewalski
Cape grysbok
Carnivores
Argentine gray fox
Azara's fox
Andean fox
Gray fox
Swift fox
Cross fox
Speckle-throated otter
Brown palm civet
Palawan stink badger
Asiatic jackal
Racoon dog
American jackal
Arctic wolf
Red wolf
Black-backed jackal
Common fox
Rusty-spotted cat
Maned wolf
Bush dog
Peruvian desert fox
Hoary fox
Bats
Canary big-eared bat
Dasyuroid marsupials and marsupial carnivores
Eastern quoll
Hares, pikas, and rabbits
Mexican cottontail
Bandicoots and bilbies
Eastern barred bandicoot
Elephants
African elephant
Rodents
Rudd's mole rat
Embi mole rat
Kemp's gerbil
Gracile tateril
Senegal gerbil
Nigerian gerbil
Woodland thicket rat
Typical lemniscomys
Rusty-bellied brush-furred rat
Franklin's ground squirrel
Shaw's jird
Red rock rat
Natal multimammate mouse
Pygmy mouse
Free state pygmy mouse
Long-tailed field mouse
Abyssinian grass rat
African grass rat
Angoni vlei rat
Brants's whistling rat
Creek groove-toothed swamp rat
African mole rat
Mianzini mole rat
Naivasha mole rat
Ruanda mole rat
Edentates
Screaming hairy armadillo
Large hairy armadillo
Common long-nosed armadillo
Read more at the list of biomes of the world...