A Sportsman with Shooting Pony and Gun Dogs Edwin W. Cooper of Beccles (1785-1833)

The picture has something of this: cavalry, horse, seated, mammal, mare, cowman, equestrian, two, farm, chestnut, animal, mustang, livestock, people, motion, racehorse, saddle, herder, equine, action energy.
Perhaps it’s a painting of a man standing next to a horse and two dogs with a man in a top hat.