At the watering trough Wouterus Verschuur (1812-1874)

The picture has something of this: cavalry, mammal, seated, farm, livestock, horse, two, people, cowman, mare, stable, herder, equestrian, mustang, agriculture, stallion, group, racehorse.
Perhaps it’s a painting of a man standing next to a group of horses with a dog in front of him and a dog on the other side of the painting.