Morning- Landscape with Mares and Sheep George Barret (1730-1784)

The picture has something of this: cavalry, mammal, mare, livestock, farm, mountain, landscape, seated, outdoors, tree, mustang, grassland, agriculture, nature, cattle, dawn, grass, horse.
Perhaps it’s a painting of a horse standing on a hill with a herd of sheep and a dog in the foreground and a distant landscape in the background.