Portrait of a man with two horses Albrecht Adam (1786-1862)

The picture has something of this: horse, cavalry, mammal, equestrian, equine, stallion, seated, mare, animal, farm, rider, bridle, racehorse, race, hayfield, field, jockey, grass, saddle, livestock.
Perhaps it’s a painting of two men in uniform standing next to a white horse and another man in a blue.