He was one of nine children born to the Norwegian painter, Johan Christian Dahl and his first wife Emilie.
Later, he studied animal painting with Johann Friedrich Wilhelm Wegener [de].
After three more years attending the Dresden Academy of Fine Arts, he paid a visit to London to study with Edwin Landseer; another famous animal painter.
Upon his father's death in 1857, he donated a collection of his studies and drawings to the National Gallery in Oslo and the Bergen Billedgalleri [no].
His sister Caroline was married to the Norwegian cabinet minister, Anders Sandøe Ørsted Bull.