Non-Human Elveshams

In “The Story of the Late Mr. Elvesham” by H. G. Wells, Egbert Elvesham carried out a Grand Theft Me in which he swapped bodies with a much younger man. I've wondered about the possibility of transplanting a mind from a human body into an animal brain, preferably a large animal brain such as that of a cetacean or an elephant. That might be an interesting topic for an SF story. I don't recall if it has ever been done although the opposite took place in Beyond Humanity by Justin Lieber.