Portrait of Reformer, Blucher, Tory and Crib, the Property of Rowland Alston, Esq., M.P. James Ward (1769-1859)

The picture has something of this: cavalry, mare, mammal, horse, stallion, mane, livestock, mustang, seated, farm, racehorse, animal, grassland, equine, foal, herd, pasture, equestrian, grass.
Perhaps it’s a painting of a horse and a foal with a dog in the foreground and a dog lying on the ground.